CN110238716B - Circular cutter for plastic crusher and grinding tool thereof - Google Patents
Circular cutter for plastic crusher and grinding tool thereof Download PDFInfo
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- CN110238716B CN110238716B CN201910429445.4A CN201910429445A CN110238716B CN 110238716 B CN110238716 B CN 110238716B CN 201910429445 A CN201910429445 A CN 201910429445A CN 110238716 B CN110238716 B CN 110238716B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
- B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
- B02C18/16—Details
- B02C18/18—Knives; Mountings thereof
- B02C18/182—Disc-shaped knives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
- B24B3/36—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades
- B24B3/46—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades of disc blades
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Food Science & Technology (AREA)
- Crushing And Pulverization Processes (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The invention discloses a circular cutter for a plastic crusher, a grinding tool and a machining process of the circular cutter, and belongs to the technical field of mechanical cutters. The circular-tooth cutter comprises a cylindrical cutter body, n cutter teeth are uniformly distributed in the length direction of the periphery of the cutter body, wherein n is more than or equal to 30 and less than or equal to 50, a tooth groove is formed between every two adjacent cutter teeth, and an arc surface is arranged at the edge of the bottom of the tooth groove in the length direction; the grinding tool comprises a mounting unit, a positioning unit and a grinding unit, wherein the mounting unit is used for supporting a tool body to be machined, the positioning unit is used for limiting the rotation of the tool body on the mounting unit, and the grinding unit is used for grinding the cutting edge surface of the cutter tooth; wherein the mounting unit is positioned between the positioning unit and the grinding unit; the machining process of the circular blade is that after linear cutting, a grinding tool is used for grinding the edge surface. The invention can ensure the sharpness of the circular cutter, prolong the service life of the circular cutter and conveniently and accurately grind the edge surface of the cutter under the fixation of the grinding tool.
Description
Technical Field
The invention belongs to the technical field of mechanical cutters, and particularly relates to a circular cutter for a plastic crusher, and a grinding tool and a machining process thereof.
Background
The plastic crusher is used to process waste plastic, rubber, etc. into granular crushed material to reduce the size of the material. Generally, the cutting work of the crusher is performed by the cooperation of a circular-tooth cutter and a fixed cutter, wherein the circular-tooth cutter can be adjusted to control the size of the cut particle size by cutting the material through the high-speed rotation of the circular-tooth cutter and the shear of the fixed cutter.
The circular cutter is provided with a plurality of cutter teeth for cutting materials, generally, the more the cutter teeth are, the thinner the size of the cut materials is, but the damage probability of the cutter teeth is increased; and present most closed angle transition between each sword tooth of circular tooth sword, this kind of closed angle receives the collision easily and produces the crackle in the circular tooth sword use, reduces the life of circular tooth sword. Therefore, the design of the external shape structure of the circular-tooth cutter can ensure that the cutting edge has certain strength without breaking in use while keeping the cutting edge sharp, and the design is the research and development direction of various large enterprises.
For example, chinese patent application No. 201721339875.X, published as 2018, 5, month and 4, discloses a pulverizer removable hob. The hob comprises a hob shaft, wherein a plurality of grooves which are distributed at equal intervals are formed in the circumferential surface of the hob shaft, blades are inserted into the grooves, arc-shaped grooves communicated with the grooves are formed in the end surfaces of the hob shaft, fixing assemblies for limiting the blades to slide out of the grooves are arranged in the arc-shaped grooves, the bottoms of the blades are inserted into the grooves, two sides of the blades are limited on the hob shaft, the blades are limited along the axis direction of the hob shaft through the fixing assemblies, the situation that the blades are separated from the grooves is reduced, and the blades are more stably installed on the hob shaft; when the blade needs to be disassembled, the fixing assembly only needs to be taken out of the arc-shaped groove, and the space occupied by the arc-shaped groove is small, so that the blade is convenient to disassemble from the cutter shaft. Obviously, the problem that the whole hob needs to be replaced due to local damage of the blade is solved, however, the hob is formed by splicing a plurality of components, although the blade on the hob is convenient to replace, the blade is easy to damage due to impact force of materials on the joint in the actual production process because the force bearing of the spliced joint is not strong; the fixed component used for limiting on the hob can influence the fineness of material crushing, and even the connection part is easy to loosen under the action of centrifugal force in the high-speed rotation process; finally, the blades of the hob are spliced on the hob shaft, and the spliced connection part is inevitably a sharp corner, so that the blade is easy to loose due to collision, and the service life of the hob is shortened.
On the other hand, the cutting edge of the cutter after normal cutting processing has a plurality of convex small peak lines, the peaks are sharp but weak and are easy to break, the cutting force is increased after the rear small peaks are broken, more heat is generated, the sharpness of the cutter is influenced, even the cutter is broken and damaged, and the service life of the cutter is shortened. On the other hand, in the polishing process of the circular serrated knife, the circular serrated knife is not easy to fix and needs to be adapted to polishing of the cutting edge surfaces with different cutting edge angles, and the polishing device can ensure polishing precision and meet the requirement of roughness of the cutting edge surfaces, so that some difficulties exist.
For example, chinese patent application No. 201810448887.9, published as 2018, 9, 21, discloses a tooth-shaped round insert sharpening fixture. The tool grinding clamp comprises a sliding block, a support column and a connecting pipe, wherein a tool parameter table is arranged on the front surface of the support column, the support column is fixedly bonded with the tool parameter table, a base is arranged on the bottom surface of the support column, the support column is fixedly welded with the base, a grinding wheel is arranged on the left surface of the support column, the support column is fixedly connected with the grinding wheel, and a protective cover is arranged above the grinding wheel; still set up two fixed plates, connecting pipe and regulation pole on the sharpen fixture, can utilize two fixed plates, connecting pipe and regulation pole to fix the circular knife piece of processing, make the circular knife piece can not take place the incline in the course of working to make the circular knife piece accomplish the back in processing, can reach original specification, and still set up the fin on the sharpen fixture, can utilize the fin to dispel the heat to the circular knife piece, prevent it from breaking, thereby reach and use convenient effect. However, when the jig is used to machine the circular cutter of the present invention, a clamp mark is generated on the circular cutter, which affects the grinding accuracy on the cutting edge surface.
Therefore, in order to facilitate the positioning and processing and increase the sharpness of the circular cutter, it is necessary to develop a grinding tool and a processing technology of the circular cutter for the plastic crusher.
Disclosure of Invention
1. Problems to be solved
The invention provides a circular-tooth cutter for a plastic crusher, which is characterized in that a plurality of cutter teeth are arranged, and the joint of each cutter tooth is an arc surface, so that the problem that the circular-tooth cutter is easy to crack due to collision of materials is solved, the service life of the circular-tooth cutter is prolonged, and the particle size of crushed materials is ensured to be smaller.
The invention also provides a grinding tool of the circular-tooth cutter for the plastic crusher, and aims to solve the problem that the circular-tooth-shaped circular-tooth cutter is not easy to fix.
The invention also provides a processing technology of the circular cutter of the plastic crusher, and aims to solve the problems that the circular cutter of the plastic crusher processed by the existing milling machine is insufficient in sharpness and easy to crack.
2. Technical scheme
In order to solve the problems, the technical scheme adopted by the invention is as follows:
a circular cutter for a plastic crusher comprises a cutter body, wherein cutter teeth and mounting holes are arranged on the cutter body, and cutting edge surfaces are arranged on the cutter teeth; the cutter body is cylindrical, n cutter teeth are evenly distributed on the periphery of the cutter body in the length direction, n is more than or equal to 30 and less than or equal to 50, the included angle between the edge faces of the adjacent cutter teeth is alpha, alpha is more than or equal to 7.2 degrees and less than or equal to 12 degrees, a tooth socket is formed between every two adjacent cutter teeth, and an arc surface is arranged at the edge of the bottom of the tooth socket in the length direction.
Preferably, the number of teeth is preferably n = 40.
Preferably, the radius of the arc surface is R, and R is more than or equal to 0.7 mm and less than or equal to 1.3 mm.
Preferably, the edge angle formed by the edge face on the cutter tooth is theta, and the angle is more than or equal to 50 degrees and less than or equal to 60 degrees.
The grinding tool for the circular-tooth cutter for the plastic crusher comprises a mounting unit, a positioning unit and a grinding unit, wherein the mounting unit is used for supporting a cutter body to be machined, the positioning unit is used for limiting the rotation of the cutter body on the mounting unit, and the grinding unit is used for grinding the cutting edge surface of the cutter tooth; wherein the mounting unit is located between the positioning unit and the grinding unit.
Further, the installation unit includes installation department and spacing portion, the installation department is spacing portion and is close to the terminal surface bulge of positioning element side, and when grinding operation, the installation department cooperation is inserted in the mounting hole of cutter body, spacing portion restriction cutter body's displacement.
Further, the mounting unit further comprises a support, and the support is located below the limiting portion and used for fixing the mounting unit on the workbench.
Further, the positioning unit includes a stopper pin which is fittingly inserted into a tooth groove of the tool body to restrict rotation of the tool body in a grinding operation.
Furthermore, the positioning unit also comprises a shaft sleeve, a fixed rod and a fixed seat which are sequentially connected; a screw rod is arranged on the side surface of the shaft sleeve, a through hole is formed in the shaft sleeve in the length direction, and the stop pin is in threaded connection with the through hole of the shaft sleeve; a waist-shaped hole A is formed in the length direction of the fixing rod, a screw rod is inserted in a matching manner, and the shaft sleeve is fixedly connected to the fixing rod through a nut; a waist-shaped hole B is formed in the length direction of the fixing seat, and the fixing seat is fixed on the workbench through a bolt.
Furthermore, the grinding unit comprises a grinding wheel and a grinding wheel dresser, the grinding wheel is used for grinding the edge surface, and the grinding wheel dresser is positioned right below the grinding wheel, wherein the grinding wheel dresser is used for dressing the grinding surface of the grinding wheel, so that fine arcs and angles on the grinding surface can be accurately dressed, and the dressed grinding wheel can achieve very high precision.
Further, the grinding wheel dresser comprises a diamond pen, a telescopic pin and a shaft rod, wherein the diamond pen is located at the top end of the shaft rod and used for dressing a grinding surface of a grinding wheel; the telescopic pin is inserted into the side surface of the shaft lever and contacts the bottom end of the diamond pen for controlling the height of the diamond pen. Namely, when the grinding wheel is dressed, the telescopic pin is inserted, and the top of the diamond pen can contact the grinding surface of the grinding wheel; when the grinding wheel is stopped to be dressed, the telescopic pin is taken out, the height of the diamond pen is reduced, and the top of the diamond pen is far away from the grinding surface of the grinding wheel.
Further, the mounting unit and the positioning unit are fixed on the die holder, the grinding unit is fixed on the workbench, and the die holder can slide on the workbench.
A use method of a grinding tool of a circular cutter for a plastic crusher comprises the following steps:
(1) assembling a grinding tool;
(2) mounting the mounting hole of the cutter body on the mounting part of the mounting unit in a matching manner, and rotating the cutter body to enable the cutting edge surface to be processed to face upwards;
(3) inserting a stop pin into the tooth groove to enable the cutting edge surface to be machined to be in a relatively close horizontal position;
(4) moving the die holder to enable the cutting edge surface to be machined of the tool body to be located at a grinding position right below the grinding wheel, and grinding the cutting edge surface by using the grinding wheel;
(5) and (5) repeating the steps (2) to (4), and grinding the other cutting edge surface until the cutting edge surfaces on the cutter body are all polished.
Further, in the step (2), the mounting unit further includes a limiting portion, the mounting portion is a protruding portion at one end of the limiting portion, the cutter body is movably mounted on the mounting portion, and the limiting portion is used for limiting displacement of the cutter body on the mounting portion.
Further, in the step (3), the stop pin is inserted into the tooth slot between two adjacent integral edge surfaces according to the value of theta/alpha or the value of (180-theta)/alpha, wherein the adjacent integral edge surfaces are adjacent to the edge surface to be machined, and the edge surface to be machined is in a relatively approximate horizontal position;
after the grinding operation of the grinding wheel is finished in the step (4) or the step (5), the diamond pen on the grinding wheel dresser is lifted, the telescopic pin is inserted, the diamond pen is made to contact the surface of the grinding wheel, and the grinding wheel is rotated to dress the surface of the grinding wheel.
A machining process of a circular cutter for a plastic crusher is characterized in that a cutter body is molded by adopting a linear cutting technology, and after the linear cutting molding, a cutting edge surface is polished by adopting the grinding tool.
3. Advantageous effects
Compared with the prior art, the invention has the beneficial effects that:
(1) the edge of the tooth socket of the circular tooth cutter is the arc surface, and crushed aggregates collide with the edge in the use process of the circular tooth cutter, so that impact force can be dispersed, the phenomenon that when the edge is a sharp corner, the impact force is concentrated at the sharp corner, so that the sharp corner is collided and cracked to generate cracks is prevented, and meanwhile, the rotating speed of a blade is influenced by the blockage of the material in the tooth socket is reduced; the tooth grooves are arranged into the fillet square grooves, compared with the right-angle square grooves, sharp corners in the square grooves are easy to crack, impact force applied in the arc angles is relatively uniformly dispersed to each point, the stress direction of each point can extend through the axis of a cylinder where the arc angles are located, the damage rate of the blade is reduced, and the service life of the blade is prolonged; the invention also optimizes the arrangement of the radius of the arc surface, and the radius is 0.7-1.3 mm, so that the processing requirement can be basically met;
(2) the number of the cutter teeth of the cutter blade is 30-50, and when the number of the cutter teeth is less than 30, the cutting force of the cutter body is insufficient, and the size of crushed materials is too large; when the number of the cutter teeth is more than 50, the cutter teeth are too complex to process, the cost is high, and the batch production is not facilitated; the number of the cutter teeth is preferably 40, in the process of processing materials, the rotating speed of the cutter body is greater than that of the materials, the materials can be cut by each cutter head on the cutter teeth, and the material is smaller in size when being shredded, so that the requirement on processing the materials with higher requirements on the size of the shredded materials is met;
(3) the cutting edge angle formed by the cutting edge surface on the cutter tooth is 50-60 degrees, and when materials are crushed, shearing force in different directions is given, so that the crushed particles of the materials are ensured to be smaller in size;
(4) the grinding tool can accurately position the cutting edge surface, so that the cutting edge surface is positioned at the optimal grinding position; the blade body is movably arranged on the mounting part of the mounting unit, so that the edge surface to be machined can be conveniently replaced, the limiting part of the mounting unit props against the cutter body, the cutter body is prevented from moving on the mounting part, and the grinding precision of the grinding wheel is ensured; the stop pin is inserted into the tooth groove, so that the rotation of the cutter body is prevented, and the cutting edge surface to be machined is always in a machining position;
(5) the mounting unit and the positioning unit of the grinding tool are used in a matched mode, so that the phenomena that the existing grinding fixture is too large in contact area with a workpiece, heat is not easy to dissipate, the cutter body is locally overheated, and cracks are easy to generate in the grinding process are avoided;
(6) waist-shaped holes are formed in the fixing rod and the fixing seat of the grinding tool positioning unit, so that the fixing position of a screw or a bolt can be conveniently adjusted, and the stop pin of the positioning unit can be adjusted up, down, left and right as required; the stop pin is inserted into the shaft sleeve in a threaded connection mode, the stop pin can be stretched in the shaft sleeve, and meanwhile, the close connection between the stop pin and the shaft sleeve is kept, and the stop pin can be fixed in a stretching mode, so that the tooth grooves into which the stop pin is inserted can be conveniently replaced without disassembling the whole positioning unit after one-time grinding work is finished;
(7) the grinding wheel dresser is arranged below the grinding wheel of the grinding unit, so that the surface of the grinding wheel can be dressed when the grinding wheel is slightly worn, the grinding wheel does not need to be replaced, the service life of the grinding wheel is prolonged, and the grinding precision of a grinding part is ensured; the diamond pen on the grinding wheel dresser can stretch and be movably installed in a matched installation hole, through installation of the telescopic pin on the side face of the grinding wheel dresser, when the grinding wheel is not required to be dressed, the telescopic pin is pulled out, the diamond pen is lowered and is far away from the grinding wheel, and when the grinding wheel is dressed, the telescopic pin is inserted, so that the diamond pen is lifted to a rough position contacting with the surface of the grinding wheel, and the dressing work of the grinding wheel is carried out;
(8) the mounting unit and the positioning unit are mounted on the same die holder, and the grinding unit is not mounted on the die holder, so that the mounting unit and the positioning unit are mounted and fixed on the tool body at positions far away from the grinding unit, and the tool body can be sent to the grinding position of the grinding unit for grinding, time and labor are saved, and the working efficiency is improved;
(9) according to the processing technology, the cutting edge surface is polished after the wire cutting, so that the phenomenon that the cutting surface is rough in surface due to small sharp-peak lines after the wire cutting is avoided, on one hand, the sharpness of a cutter is improved, and further the size of the crushed material is smaller; on the other hand, the small peak lines are prevented from being impacted by the material to generate cracks, so that the service life of the cutter is prolonged; therefore, raised small sharp-peak lines on the cutting edge surface are ground flat before use, and local stress concentration is reduced, so that the impact strength is improved, and the service life of the cutter is prolonged.
Drawings
FIG. 1 is a front view of the circular cutter of the present invention;
FIG. 2 is an enlarged view of a portion of area A of FIG. 1;
FIG. 3 is a left side view of the grinding tool of the present invention;
FIG. 4 is a partial enlarged view of the area B in FIG. 3;
FIG. 5 is a right side view of the grinding tool of the present invention;
FIG. 6 is a schematic structural view of the stop pin and the sleeve in cooperation with each other;
FIG. 7 is a schematic view of a wheel dresser according to the present invention;
in the figure:
100. a cutter body; 110. cutter teeth; 111. a cutting edge surface; 120. a tooth socket; 121. a circular arc surface; 130. mounting holes; 131. a keyway; 200. a mounting unit; 210. an installation part; 220. a limiting part; 230. a support; 300. a positioning unit; 310. a retaining pin; 320. a shaft sleeve; 321. a screw; 330. fixing the rod; 331. a waist-shaped hole A; 340. a fixed seat; 341. a waist-shaped hole B; 400. a grinding unit; 410. a grinding wheel; 420. a grinding wheel dresser; 421. a diamond pen; 422. a retractable pin; 423. a shaft lever; 500. and (4) die holders.
Detailed Description
The invention is further described with reference to specific examples.
Example 1
As shown in fig. 1, a circular-tooth cutter for a plastic crusher comprises a cylindrical cutter body 100, wherein the cutter body 100 is provided with cutter teeth 110, tooth grooves 120 and mounting holes 130, the number of the cutter teeth 110 is 40, the cutter teeth 110 are uniformly distributed in the length direction of the periphery of the cutter body 100, the cutter teeth 110 are provided with cutting edge surfaces 111, and as shown in fig. 2, the cutting edge angle formed by the cutting edge surfaces 111 is theta, theta =55 degrees, and the included angle alpha formed between the cutting edge surfaces 111 on two adjacent cutter teeth 110 is 9 degrees; the tooth groove 120 is a space formed between two adjacent cutter teeth 110 and is an arc-angle square groove, namely, an arc surface 121 is arranged at the edge of the groove bottom 120 in the length direction, wherein the radius of the arc surface 121 is 1 mm, so that a sharp corner is prevented from being formed at the groove bottom of the tooth groove 120, and in the crushing process of the sharp corner, materials collide with the sharp corner and are subjected to a large impact force, and the sharp corner is easy to crack, so that a cutter is damaged; the mounting hole 130 is a circular through hole, and a square key slot 131 is formed at one position of the through hole and is used for being matched with a crusher to mount the circular-tooth cutter of the embodiment, so that the mounting unit 200 can be fixed when the cutting edge surface 111 of the circular-tooth cutter is machined.
Generally, for circular tooth cutters with the above shapes, especially for cutters with excessive cutter teeth 110, it is obvious that the cutting and processing by using a milling machine is time-consuming and labor-consuming, and is not beneficial to industrial production. The cutting edge surface 111 of the cutter is the key of the sharpness of the cutter, so that the cutting edge surface 111 needs to be smooth enough to meet the crushing requirement, even the cutting edge surface 111 is not smooth, small peak grains on the cutting edge surface can be broken by the impact of materials, the cutter teeth 110 are easy to break, and the whole circular cutter is scrapped, so that the inventor improves the processing technology of the circular cutter, namely, after online cutting, the cutting edge surface 111 on the cutter body 100 is finely ground.
However, since the circular-tooth cutter of the present embodiment is cylindrical, it is not easy to clamp and fix, and the number of cutter teeth 110 is large, and the cutting edge surface 111 is worn by the existing clamp when contacting the cutting edge surface 111 during clamping, the inventor invented a special grinding tool thereof during grinding of the circular-tooth cutter.
Specifically, as shown in fig. 3 and 4, the grinding tool for the circular cutter for the plastic crusher comprises an installation unit 200, a positioning unit 300 and a grinding unit 400, wherein the installation unit 200 is located between the positioning unit 300 and the grinding unit 400, and the installation unit 200 and the positioning unit 300 are fixed on the same die holder 500. Wherein the mounting unit 200 is used for supporting the tool body 100 to be machined, the positioning unit 300 is used for limiting the rotation of the tool body 100 on the mounting unit 200, and the grinding unit 400 is used for grinding the cutting edge surface 111 of the cutter tooth 110.
The mounting unit 200 comprises a mounting part 210, a limiting part 220 and a support 230, the support 230 is fixed on the die holder 500, the limiting part 220 is fixedly arranged above the support 230, the limiting part 220 can be in a cylinder, cube or other shapes, and the size of the end surface of the limiting part 220 is larger than the size of the mounting hole 130 on the tool body 100; the mounting portion 210 is a cylindrical end surface protrusion of the limiting portion 220, and has a diameter smaller than or equal to the diameter of the mounting hole 130 of the tool body 100, and is used for being inserted into the mounting hole 130 of the tool body 100 to lift the tool body 100, at this time, the tool body 100 can rotate on the mounting portion 210, but due to the existence of the limiting portion 220, the limiting portion 220 blocks the movement of the tool body 100 on the mounting portion 210, so as to fix the position of the tool body 100 during grinding work.
As shown in fig. 4 and 5, the positioning unit 300 is disposed at one side of the mounting portion 210, and includes a stop pin 310, and a fixed position stop pin 310, which is inserted into the tooth slot 120 of the tool body 100 to limit the rotation of the tool body 100 on the mounting portion 210, so that the cutting edge surface 111 to be machined is in a relatively close horizontal position. However, the fixing method of the stop pin 310 has its limitation that the stop pin 310 should be removed every time the machined cutting edge 111 is replaced. For convenience of processing, the positioning unit 300 further includes a shaft sleeve 320, a fixing rod 330, and a fixing base 340. As shown in fig. 6, a through hole with threads is formed in the shaft sleeve 320 in the length direction, a stop pin 310 connected with the threads is inserted into the through hole, the stop pin 310 rotates along with the threads of the threads to realize displacement in the length direction, and when the stop pin 310 is not rotated, the stop pin 310 limits the extension and retraction of the stop pin in the shaft sleeve 320 through the threads; the side of the sleeve 320 is also provided with a threaded screw 321. A waist-shaped hole A331 is formed in the length direction of the fixing rod 330, a screw 321 inserted into the shaft sleeve 320 is matched in the waist-shaped hole A331, the shaft sleeve 320 is fixed on the fixing rod 330 through a nut, and the positions of the screw 321 inserted into the waist-shaped holes A331 are different, so that the height of the shaft sleeve 320 can be adjusted, and further the height of the stop pin 310 is adjusted; the bottom of the fixing rod 330 is fixed on the fixing base 340. A waist-shaped hole B341 is formed in the length direction of the fixing seat 340, the waist-shaped hole B341 is matched with an inserted bolt, the fixing seat 340 is fixed on the die holder 500, the position of the bolt inserted into the waist-shaped hole B341 can be adjusted, and then the distance between the positioning unit 300 and the installation unit 200 is adjusted.
The grinding unit 400 comprises a grinding wheel 410 and a grinding wheel dresser 420, wherein the grinding wheel 410 is fixed on the grinding wheel fixing seat 340 and is electrically connected with the grinding wheel 410 through a switch, namely the rotation of the grinding wheel 410 is controlled through the switch to grind the cutting edge surface 111 to be machined; the grinding wheel dresser 420 is installed right below the grinding wheel 410, a diamond pen 421 is arranged at the top of the grinding wheel dresser, when the surface of the grinding wheel 410 is uneven, the grinding wheel dresser 420 is installed and fixed, the diamond pen 421 on the grinding wheel dresser just contacts the uneven surface of the grinding wheel 410, a switch is turned on, the grinding wheel 410 rotates, and the diamond pen 421 can polish the uneven surface to a required shape. It should be noted that, in actual factory machining, because the hardness of the surface of the workpiece ground by the grinding wheel 410 is too high, the surface of the grinding wheel 410 is easily damaged, the workload of frequently mounting and dismounting the grinding wheel dresser 420 is large, and the machining cycle is prolonged, so that the diamond pen 421 which can be vertically extended and retracted in the grinding wheel dresser 420 is designed, as shown in fig. 7, specifically, the grinding wheel dresser 420 comprises a shaft 423, the diamond pen 421 and an extension pin 422, the bottom of the shaft 423 is fixed on a worktable right below the grinding wheel 410, a hole for extending and retracting the diamond pen 421 is formed at the upper end of the shaft 423, a hole communicated with the upper end of the shaft 423 is formed at the side end of the shaft 423 for inserting the extension pin 422, and the diamond pen 421 is lifted up, so that the diamond.
According to the description of the structure of the grinding tool for the circular cutter for the plastic crusher, the use method of the grinding tool comprises the following steps:
(1) fixing the installation unit 200 on the die holder 500 through the support 230 thereof, and fixing the positioning unit 300 on the die holder 500 through the fixing seat 340 thereof and located at one side of the installation part 210 on the installation unit 200;
(2) the mounting hole 130 of the tool body 100 is mounted on the mounting part 210 of the mounting unit 200 in a matching manner, the limiting part 220 of the mounting unit 200 blocks the tool body 100, the movement of the tool body 100 on the mounting part 210 is limited, and the tool body 100 is rotated to enable the cutting edge surface 111 to be processed to be upward;
(3) calculating the value of theta/alpha =55 °/9 ° to be about 6.11, namely, counting from the edge face 111 adjacent to the edge face 111 to be machined, the gullet 120 between the 6 th edge face 111 and the 7 th edge face 111 is the positioning gullet 120 of the stop pin 310;
rotating the stop pin 310 to insert the stop pin into the tooth slot 120, wherein the cutting edge surface 111 to be machined is in a relatively nearly horizontal position;
(4) after the tool body 100 is fixed, the die holder 500 is moved to a position where the cutting edge surface 111 to be machined of the tool body 100 is located at a grinding position right below the grinding wheel 410, the switch is turned on, and the grinding wheel 410 is used for grinding the cutting edge surface 111;
(5) and (5) repeating the steps (2) to (4), and replacing the cutting edge surfaces 111 to be ground until all 40 cutting edge surfaces 111 on the cutter body 100 are ground, so that the grinding of the cutting edge surfaces 111 of the circular tooth cutter in the embodiment is completed.
Example 2
The circular serrated knife for the plastic crusher and the grinding tool and the processing technology thereof are basically the same as those in embodiment 1, and the difference is that: the number of the cutter teeth 110 is 30, namely, the included angle alpha formed between the edge surfaces 111 on two adjacent cutter teeth 110 is 12 degrees; the edge face 111 forms an edge angle θ, θ =50 °; the radius of the circular arc surface 121 is 1.3 mm.
According to the description of the structure of the grinding tool for the circular cutter for the plastic crusher, the use method of the grinding tool comprises the following steps:
(1) fixing the installation unit 200 on the die holder 500 through the support 230 thereof, and fixing the positioning unit 300 on the die holder 500 through the fixing seat 340 thereof and located at one side of the installation part 210 on the installation unit 200;
(2) the mounting hole 130 of the tool body 100 is mounted on the mounting part 210 of the mounting unit 200 in a matching manner, the limiting part 220 of the mounting unit 200 blocks the tool body 100, the movement of the tool body 100 on the mounting part 210 is limited, and the tool body 100 is rotated to enable the cutting edge surface 111 to be processed to be upward;
(3) calculating θ/α =50 °/12 ° to have a value of about 4.17, i.e., the gullet 120 between the 4 th cutting edge 111 and the 5 th cutting edge 111, i.e., the locating gullet 120 of the stop pin 310, counted from the adjacent cutting edge 111 to the cutting edge 111 to be machined;
rotating the stop pin 310 to insert the stop pin into the tooth slot 120, wherein the cutting edge surface 111 to be machined is in a relatively nearly horizontal position;
(4) after the tool body 100 is fixed, the die holder 500 is moved to a position where the cutting edge surface 111 to be machined of the tool body 100 is located at a grinding position right below the grinding wheel 410, the switch is turned on, and the grinding wheel 410 is used for grinding the cutting edge surface 111;
(5) and (5) repeating the steps (2) to (4), and replacing the cutting edge surfaces 111 to be ground until 30 cutting edge surfaces 111 on the cutter body 100 are ground, so that the grinding of the cutting edge surfaces 111 of the circular tooth cutter in the embodiment is completed.
Example 3
The circular serrated knife for the plastic crusher and the grinding tool and the processing technology thereof are basically the same as those in embodiment 1, and the difference is that: the number of the cutter teeth 110 is 50, namely, the included angle alpha formed between the edge surfaces 111 on two adjacent cutter teeth 110 is 7.2 degrees; the edge face 111 forms an edge angle θ, θ =60 °; the radius of the circular arc surface 121 is 0.7 mm.
According to the description of the structure of the grinding tool for the circular cutter for the plastic crusher, the use method of the grinding tool comprises the following steps:
(1) fixing the installation unit 200 on the die holder 500 through the support 230 thereof, and fixing the positioning unit 300 on the die holder 500 through the fixing seat 340 thereof and located at one side of the installation part 210 on the installation unit 200;
(2) the mounting hole 130 of the tool body 100 is mounted on the mounting part 210 of the mounting unit 200 in a matching manner, the limiting part 220 of the mounting unit 200 blocks the tool body 100, the movement of the tool body 100 on the mounting part 210 is limited, and the tool body 100 is rotated to enable the cutting edge surface 111 to be processed to be upward;
(3) calculating (180 ° - θ)/α =120 °/7.2 ° to be about 16.67, i.e., the gullet 120 between the 16 th facet 111 and the 17 th facet 111, i.e., the locating gullet 120 of the stop pin 310, as counted from the adjacent facet 111 to the facet 111 to be machined;
rotating the stop pin 310 to insert the stop pin into the tooth slot 120, wherein the cutting edge surface 111 to be machined is in a relatively nearly horizontal position;
(4) after the tool body 100 is fixed, the die holder 500 is moved to a position where the cutting edge surface 111 to be machined of the tool body 100 is located at a grinding position right below the grinding wheel 410, the switch is turned on, and the grinding wheel 410 is used for grinding the cutting edge surface 111;
(5) and (5) repeating the steps (2) to (4), and replacing the cutting edge surface 111 to be ground until 50 cutting edge surfaces 111 on the cutter body 100 are ground, so that the grinding of the cutting edge surface 111 of the circular tooth cutter in the embodiment is completed.
Claims (5)
1. The utility model provides a plastic grinder is with circular tooth sword, includes cutter body (100), is equipped with sword tooth (110) and mounting hole (130) on cutter body (100), is equipped with cutting edge face (111) on sword tooth (110), its characterized in that: the cutter body (100) is cylindrical, n cutter teeth (110) are evenly distributed on the periphery of the cutter body in the length direction, wherein n is more than or equal to 30 and is less than or equal to 50, the included angle between the edge surfaces (111) of the adjacent cutter teeth is alpha, alpha is more than or equal to 7.2 degrees and is less than or equal to 12 degrees, a tooth socket (120) is formed between the two adjacent cutter teeth (110), an arc surface (121) is arranged at the edge of the tooth socket (120) in the length direction, the edge angle formed by the edge surfaces (111) on the cutter teeth (110) is theta, and theta is more than or equal to 50 degrees and is less than or equal to 60 degrees.
2. The circular cutter for plastic pulverizer as claimed in claim 1, wherein: the radius of the arc surface (121) is 0.7-1.3 mm.
3. The grinding tool of the circular cutter for the plastic crusher of claim 1 or 2, characterized in that: the grinding machine comprises a mounting unit (200), a positioning unit (300) and a grinding unit (400), wherein the mounting unit (200) is used for supporting a tool body (100) to be machined, the positioning unit (300) is used for limiting the rotation of the tool body (100) on the mounting unit (200), and the grinding unit (400) is used for grinding the cutting edge surface (111) of a cutter tooth (110); wherein the mounting unit (200) is located between the positioning unit (300) and the grinding unit (400); the mounting unit (200) and the positioning unit (300) are fixed on the die holder (500), the grinding unit (400) is fixed on the workbench, and the die holder (500) can slide on the workbench;
the positioning unit (300) comprises a stop pin (310), a shaft sleeve (320), a fixing rod (330) and a fixing seat (340) which are sequentially connected;
a screw rod (321) is arranged on the side surface of the shaft sleeve (320), a through hole is formed in the shaft sleeve (320) in the length direction, and the stop pin (310) is in threaded connection with the through hole of the shaft sleeve (320);
a waist-shaped hole A (331) is formed in the length direction of the fixing rod (330), a screw rod (321) is inserted in a matching mode, and the shaft sleeve (320) is fixedly connected to the fixing rod (330) through a nut;
a waist-shaped hole B (341) is formed in the length direction of the fixed seat (340), and the fixed seat (340) is fixed on the workbench by matching with a bolt; during the grinding operation, the stop pin (310) is inserted into the tooth groove (120) of the cutter body (100) in a matched mode, and rotation of the cutter body (100) is limited.
4. The grinding tool of claim 3, wherein: installation element (200) are including installation department (210) and spacing portion (220), installation department (210) are the terminal surface bulge portion that spacing portion (220) are close to positioning unit (300) side, when grinding operation, installation department (210) cooperation is inserted in mounting hole (130) of cutter body (100), the displacement of spacing portion (220) restriction cutter body (100).
5. The grinding tool of claim 3, wherein: the grinding unit (400) comprises a grinding wheel (410) and a grinding wheel dresser (420), wherein the grinding wheel (410) is used for grinding the edge surface (111), and the grinding wheel dresser (420) is located right below the grinding wheel (410).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910429445.4A CN110238716B (en) | 2019-05-22 | 2019-05-22 | Circular cutter for plastic crusher and grinding tool thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910429445.4A CN110238716B (en) | 2019-05-22 | 2019-05-22 | Circular cutter for plastic crusher and grinding tool thereof |
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| CN110238716A CN110238716A (en) | 2019-09-17 |
| CN110238716B true CN110238716B (en) | 2020-12-25 |
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| CN113290428B (en) * | 2021-06-16 | 2023-07-04 | 无锡微研股份有限公司 | Blade fixing plate forming process |
| CN114770238A (en) * | 2022-05-26 | 2022-07-22 | 冯兴垚 | Knife sharpener for wood cutting knife |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US1039210A (en) * | 1912-06-12 | 1912-09-24 | Us Slicing Machine Co | Sharpening device for knives of meat-slicing machines. |
| CN201989043U (en) * | 2011-01-25 | 2011-09-28 | 无锡中亚工具厂 | Punch former |
| CN103273290B (en) * | 2013-06-13 | 2015-05-20 | 沈阳飞机工业（集团）有限公司 | Machining process of milling cutter with ultrathin slice |
| CN204321839U (en) * | 2014-11-28 | 2015-05-13 | 湖北铭久汽车零部件有限公司 | Gear hob sword clamp |
| CN205218702U (en) * | 2015-12-28 | 2016-05-11 | 浙江炬达机械有限公司 | Shoe insole edge cutting machine and knife grinding mechanism thereof |
| CN109225536A (en) * | 2018-09-14 | 2019-01-18 | 江苏佳腾新材料有限公司 | A kind of special stainless steel wire raw material crushing wheel |
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Denomination of invention: Circular tooth cutter for plastic crusher and its grinding tooling Effective date of registration: 20221123 Granted publication date: 20201225 Pledgee: Hengshan Ma'anshan finance Company limited by guarantee Pledgor: ANHUI FENGLIRUI BLADE MANUFACTURE Co.,Ltd. Registration number: Y2022980023166 |