CN114248072B - GN shearing type internal mixer rotor body processing method and processing equipment - Google Patents
GN shearing type internal mixer rotor body processing method and processing equipment Download PDFInfo
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- CN114248072B CN114248072B CN202111565532.6A CN202111565532A CN114248072B CN 114248072 B CN114248072 B CN 114248072B CN 202111565532 A CN202111565532 A CN 202111565532A CN 114248072 B CN114248072 B CN 114248072B
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Abstract
The invention provides a GN shearing type internal mixer rotor body processing method and processing equipment, a casted GN shearing type internal mixer rotor body is clamped by a first clamping chuck and an auxiliary clamping piece, and then a processing reference point is confirmed first; by the method, machining by the numerical control milling machine becomes possible, and the machining speed and the machining precision of parts are greatly improved.
Description
Technical Field
The invention relates to the technical field of processing, in particular to a GN shearing type internal mixer rotor body processing method and processing equipment.
Background
At present, in the production process of most internal mixer production enterprises, the tangent type rotor body is polished manually, the polishing time is long, and the precision is difficult to ensure; for example: the existing processing method has the disadvantages that the N-type rotor body is completely polished manually, the efficiency is very low, the polishing is generally required for 3-5 days depending on the casting allowance of the rotor body, and the N-type rotor body has large volume (the length can reach 1.2 meters and the diameter can reach 0.7 meter) and complex appearance, so the polished rotor body is very difficult to meet the design standard; resulting in poor quality of the produced rotor body and low productivity. The invention designs a set of processing technology and processing equipment, realizes the conversion from polishing to numerical control processing, meets the requirement of the overall dimension of the rotor body, improves the production efficiency, reduces the manufacturing cost, can realize the excircle turning by milling, reduces the scribing times, ensures the unification of the datum of a numerical milling blank and a numerical milling alloy, improves the precision of the numerical milling alloy and improves the wire aligning speed and precision of a welding robot.
Disclosure of Invention
The invention mainly aims to provide a GN shearing type internal mixer rotor body processing method and processing equipment, aiming at solving the problems of low efficiency and poor quality of the existing processing method for producing a rotor body;
in order to achieve the purpose, the technical scheme provided by the invention is as follows: a GN shearing type internal mixer rotor body processing method comprises GN shearing type internal mixer rotor body processing equipment, wherein the GN shearing type internal mixer rotor body processing equipment comprises a numerically controlled milling machine, a control module, a first clamping chuck and an auxiliary clamping piece, the first clamping chuck is used for clamping one process spigot of an internal mixer rotor body, the first clamping chuck is also used for rotating the internal mixer rotor body, and the auxiliary clamping piece is used for clamping the other process spigot of the internal mixer rotor body; the GN shearing type internal mixer rotor body processing method comprises the following steps:
clamping a cast GN shearing type internal mixer rotor body through a first clamping chuck and an auxiliary clamping piece;
determining a processing reference point: the machining of the datum points comprises the steps of moving a central drill of the numerical control milling machine to a long edge central point, and drilling a datum hole to determine a rotor body coordinate system;
verifying the machining reference point: axial processing of the excircle of a long edge and a short edge is carried out according to a rotor body coordinate system, then trial cutting is carried out on the edge tops of the long edge and the short edge, if two trial cut lines on the same edge obtained by trial cutting meet the parallelism requirement, and the mutual allowance distribution of two long edges or two short edges arranged oppositely meets the requirement, a processing reference point is correct, and if the two trial cut lines on the same edge obtained by trial cutting do not meet the parallelism requirement, or the mutual allowance distribution of two long edges or two short edges arranged oppositely does not meet the requirement, the processing reference point is wrong;
if the machining datum point is correct, machining and forming according to a set program by using a numerical control milling machine;
and if the processing reference point is wrong, manually adjusting the rotation angle of the first clamping chuck, then confirming the processing reference point again, and then verifying the processing reference point until the processing reference point is correct.
Preferably, the step of determining the machining reference point further includes confirming a pin coordinate system: and moving the cutter of the numerical control milling machine to a scribing point of the safety pin, recording the position information of the cutter at the moment as a reference point of the safety pin, and recording the rotating angle of the first clamping chuck at the moment.
Preferably, if the machining reference point is correct, the machining and molding by using the numerically controlled milling machine according to a set program includes:
processing root transition circles of the long edges and the short edges: milling root transition circles of the long edges and the short edges according to a preset program by using a numerical control milling machine and a first clamping chuck;
processing long edges and short edges: processing and molding the long-edge and short-edge prisms according to a preset program by using a numerical control milling machine and a first clamping chuck;
roughly machining a semicircle: roughly machining and forming two arcs close to the technical spigot according to a preset program by using a numerical control milling machine and a first clamping chuck;
area rough machining: performing primary processing on the connecting positions of the cylindrical surface of the rotor body and the long edges and the short edges by using a numerical control milling machine and a first clamping chuck;
rough machining of a base circle: roughly machining the surface of the cylinder of the rotor body by using a numerical control milling machine and a first clamping chuck;
and (3) fine machining of the root part of the ridge: manually judging whether the size of the machining cutter meets the precision requirement or not; if the size of the machining cutter meets the precision requirement, the connecting position of the cylindrical surface of the rotor body and the long edge and the short edge is finely machined by using a numerical control milling machine and a first clamping chuck; if the size of the machining cutter does not meet the precision requirement, the machining operation is carried out after the machining cutter is replaced;
finish machining the base circle surface: manually judging whether the size of the machining cutter meets the precision requirement or not; if the size of the machining cutter meets the precision requirement, the numerical control milling machine and the first clamping chuck are used for carrying out finish machining on two arcs close to the technical spigot and the surface of the cylinder of the rotor body.
Preferably, the step of finishing the base circle surface further comprises:
milling a reference groove: drilling a reference groove at the technical seam allowance so as to facilitate the subsequent alloy processing positioning;
drilling a reference point: drilling a reference point in the center of the reference groove;
pre-drilling a safety pin hole: and drilling a safety pin hole at the safety pin hole designed on the rotor body according to the existing processing standard.
Preferably, after the step of clamping the as-cast GN shear type internal mixer rotor body by the first clamping chuck and the auxiliary clamping member and before the step of determining the machining reference point, the method further comprises:
the coaxiality of the two process rabbets at the two ends of the rotor body is checked;
and if the coaxiality is unqualified, adjusting the first clamping chuck and the auxiliary clamping piece so that the two process rabbets at the two ends of the sub body meet the coaxiality requirement.
Preferably, in the step of roughly machining the base circle, the allowance of the machining cutter in program design is 1.5 times of the casting allowance; meanwhile, the row spacing of the machining cutter is set to be less than 50% of the diameter of the cutter.
Preferably, in the step of finishing the base circle surface, the machining tool is a line-cut cutting method, and the center of the machining tool is offset by 50% of the diameter of the machining tool when the program is set.
Preferably, in the step of milling the reference groove, the leveling length of the reference groove is not less than 100mm.
In order to achieve the above object, the present invention further provides a GN shear type internal mixer rotor body processing device, which includes a numerically controlled milling machine, a control module, a first clamping chuck and an auxiliary clamping member, wherein the first clamping chuck is used for clamping one of the process rabbets of the internal mixer rotor body, the first clamping chuck is also used for rotating the internal mixer rotor body, and the auxiliary clamping member is used for clamping the other process rabbets of the internal mixer rotor body; the auxiliary clamping piece comprises a second clamping chuck; the numerical control milling machine is used for processing the surface of the rotor body of the internal mixer, and the control module controls the movement of the numerical control milling machine according to a preset program.
Preferably, the auxiliary clamping piece further comprises a tip and a center frame, the tip is used for abutting against the process spigot of the rotor body of the internal mixer, which is far away from the first clamping chuck, and the center frame is used for rotatably supporting the process spigot of the rotor body of the internal mixer, which is far away from the first clamping chuck; the auxiliary clamping piece further comprises an inner sleeve tool, and the inner sleeve tool is used for penetrating through the mounting space of the internal mixer rotor body to rotatably support the internal mixer rotor body.
Compared with the prior art, the invention at least has the following beneficial effects:
according to the technical scheme, a rotor body of a GN shearing type internal mixer which is cast is clamped through a first clamping chuck and an auxiliary clamping piece, then a machining datum point is confirmed, due to the fact that the rotor body of the GN shearing type internal mixer is complex in structure and high in precision requirement, and meanwhile, due to the fact that large errors are inevitably generated in casting, during machining, the spiral angles of long edges and short edges on the surface of the rotor body, the coaxiality of a process spigot and the rotor body and the like need to be verified, therefore, the clamping angle of the rotor body is adjusted according to experience, then a datum hole is drilled in the middle point of the long edges, whether the machined datum point can be subjected to subsequent machining is checked in a ridge top trial cutting mode, and when the datum point is checked each time, a certain machining allowance needs to be guaranteed so as to facilitate subsequent adjustment; by the method, machining by the numerical control milling machine becomes possible, and the machining speed and the machining precision of parts are greatly improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is an installation diagram of GN shearing type internal mixer rotor body processing equipment and parts according to the present invention;
FIG. 2 is a schematic diagram of the axial processed workpiece state (the color deepened part is the processing part) of the GN shearing type internal mixer rotor body processing method provided by the invention;
FIG. 3 is a schematic diagram of the state of a work piece for the trial cutting of the crest of a GN shear type internal mixer rotor body processing method (the color deepened part is the processing part);
FIG. 4 is a schematic view of the state of the workpiece after the root transition circle processing steps of the long and short edges of the GN shear type internal mixer rotor body processing method provided by the present invention;
FIG. 5 is a schematic view of the state of the workpiece after the processing steps of the long and short edges of the GN shear type internal mixer rotor body processing method provided by the present invention (the color deepening portion is the processing portion);
FIG. 6 is a schematic diagram of the state of the workpiece after the semi-circle rough machining step of the GN shear type internal mixer rotor body machining method provided by the invention (the color deepened part is the machined part);
FIG. 7 is a schematic diagram of the state of the workpiece after the zone rough machining step of the GN shear type internal mixer rotor body machining method provided by the present invention (the color deepened part is the machined part);
FIG. 8 is a schematic diagram of the state of the workpiece after the step of rough machining the base circle in the GN shear type internal mixer rotor body machining method of the present invention (the color deepened portion is the machined portion);
FIG. 9 is a schematic view of the state of the workpiece after the step of finishing the root of the rib in the GN shear type internal mixer rotor body processing method according to the present invention (the color deepened portion is the processing portion);
FIG. 10 is a schematic view showing the state of a work piece after a step of finish machining a base circle surface in the GN shear type internal mixer rotor body processing method according to the present invention (the color deepened portion is a processing portion);
FIG. 11 is a schematic diagram of the test results of a GN shear type internal mixer rotor body processing method according to the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 1 | Numerical |
5 | |
| 2 | |
6 | |
| 3 | |
7 | |
| 4 | Auxiliary clamping piece |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, descriptions such as "first", "second", etc. in the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise explicitly stated or limited, the terms "connected", "fixed", and the like are to be understood broadly, for example, "fixed" may be fixedly connected, may be detachably connected, or may be integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a GN shearing type internal mixer rotor body processing method and processing equipment.
To facilitate understanding of the invention, the rotor body of an internal mixer to be processed in the process proposed by the invention is first described in general terms, as follows:
please refer to fig. 2: in order to facilitate processing of the internal mixer rotor body, two process rabbets 7 are additionally cast when the internal mixer rotor body is cast, the two process rabbets 7 are respectively arranged at two ends of the internal mixer rotor body, the internal mixer rotor body comprises a rotor body cylinder, two long ribs 5 and two short ribs 6, the two long ribs 5 and the two short ribs 6 are arranged on the surface of the rotor body at a specific helical angle, the circle centers of the helical angles of the two long ribs 5 and the two short ribs 6 are collinear with the axis of the rotor body cylinder, two discontinuous arc bosses (hereinafter referred to as arcs) are respectively formed at two ends of the rotor body cylinder close to the two process rabbets 7, and a transition surface is formed between the arcs and the rotor body cylinder.
Referring to fig. 1 to 11, a GN shear type internal mixer rotor body processing method, which processes an internal mixer rotor body by using GN shear type internal mixer rotor body processing equipment, wherein the GN shear type internal mixer rotor body processing equipment comprises a numerically controlled milling machine 1, a control module, a first clamping chuck 3 and an auxiliary clamping piece 4, the first clamping chuck 3 is used for clamping one process spigot 7 of the internal mixer rotor body, the first clamping chuck 3 is also used for rotating the internal mixer rotor body, and the auxiliary clamping piece 4 is used for clamping the other process spigot 7 of the internal mixer rotor body; referring to fig. 1, the processing method of the rotor body of the GN shear type internal mixer includes the following steps:
s10: clamping two ends of a cast GN shearing type internal mixer rotor body through a first clamping chuck 3 and an auxiliary clamping piece 4;
s20: determining a processing reference point: moving a center drill of the numerical control milling machine 1 to the central point of a long edge 5 of a rotor body of the internal mixer, then drilling a reference hole to determine the origin of a rotor body coordinate system, and taking the origin of the coordinate system as a processing reference point;
s30: verifying the machining reference point: respectively carrying out axial machining on the excircle of a long edge 5 and the excircle of a short edge 6 according to a rotor body coordinate system (please refer to fig. 2), then carrying out trial cutting on the edge tops of the long edge 5 and the short edge 6 (please refer to fig. 3), if two trial cut lines on the same edge obtained by trial cutting meet the parallelism requirement, and the mutual allowance distribution of two long edges 5 or two short edges 6 arranged oppositely meets the requirement, then a machining reference point is correct, and if the two trial cut lines on the same edge obtained by trial cutting do not meet the parallelism requirement, or the two long edges 5 or two short edges 6 arranged oppositely do not meet the requirement, then the machining reference point is wrong;
s40: if the processing datum point is correct, the rotor body of the internal mixer is processed and molded by using the numerical control milling machine 1 according to a set program;
s50: if the machining reference point is erroneous, the rotation angle of the first clamping chuck 3 is manually adjusted, and then the machining reference point is determined again and verified until the machining reference point is not erroneous.
Clamping a casted GN shearing type internal mixer rotor body through a first clamping chuck 3 and an auxiliary clamping piece 4, and then confirming a machining reference point, wherein due to the fact that the structure of the casted internal mixer rotor body is complex and the precision requirement is high, and meanwhile, due to the fact that large errors are inevitably generated in casting, during machining, the spiral angles of long edges 5 and short edges 6 on the surface of the rotor body, the coaxiality of a process spigot 7 and the rotor body and the like need to be verified, the clamping angle of the rotor body is firstly adjusted according to experience, then a reference hole is drilled at the middle point of the long edges 5, whether the machined reference point can be subjected to subsequent machining is checked by adopting an edge top trial cutting mode, and when each check is carried out, a certain machining allowance needs to be ensured so as to facilitate subsequent adjustment; by adopting the mode, the numerical control milling machine 1 can be used for processing, and the processing speed and the processing precision of parts are greatly improved.
In order to facilitate understanding of the present application, in step S30, since the designed sizes of the same length from the edge to the central axis of the rotor body processed by the present invention are equal, it is necessary to check whether the allowance distribution satisfies the requirement in addition to checking the parallelism of the trial cut lines.
Further, in the step of respectively performing the axial machining of the outer circle of the long edge 5 and the axial machining of the outer circle of the short edge 6 according to the rotor body coordinate system, the milling of the outer circle by the numerically controlled milling machine 1 can effectively ensure the unification of turning and milling references, and the milling efficiency is 4 times of that of turning; if the excircle is turned, firstly scribing is needed, then the excircle and the end face are turned, and scribing points disappear after the excircle is turned, then scribing is needed again, and then the shape is milled, because repeated scribing can cause the reference to be inconsistent, the end face and the shape are very easy to be turned to deviate, and because 90% of areas are empty areas during turning operation, if the turning operation is adopted, the processing efficiency is low, and the intermittent turning can generate collision, so that the loss of a cutter and a machine tool is large.
Referring to fig. 1, further, in order to verify whether the reference point is accurate, 4 lines of edges 8, specifically two long edges 5 and two short edges 6, should be cut by trial, and 2 trial cut lines should be cut respectively; when trial cutting is carried out, the radial allowance of the rotor body of the internal mixer is 5mm, if a marking process is adopted, the reference point can be wrongly marked or missed marked, for example, the wrong marking is carried out, and after trial cutting, the angle (hereinafter referred to as A value) of a rotating shaft is adjusted by using the first clamping chuck 3, so that the average machining allowance is ensured; if the scratch is missed, a midpoint value is taken from the left end face and the right end face of the long edge 5, a center drill is used for drilling a point at the long edge 5 with the depth of 0.2mm, one end of a tape measure is attached to the point during measurement and is parallel to the Y axis, the distance between the two ends of the long edge 5 is measured, and the midpoint is taken, so that the X coordinate and the A value can be obtained.
Specifically, in the coordinate system of the numerically controlled milling machine 1 of the present invention, when the part is placed horizontally, Z is the length direction of the part (the direction of the line connecting the axes of the two process spigots 7), and X is the vertical line connecting the machining tool 2 and the length direction of the part.
In a second embodiment of the GN shear type internal mixer rotor body processing method according to the present invention, the step of determining the processing reference point further includes:
s60: confirming the pin coordinate system: the cutter of the numerically controlled milling machine 1 is moved to the shear pin marking point, the position information of the cutter at this time is recorded as the reference point of the shear pin, and the rotation angle (a value) of the first chuck 3 at this time is recorded.
Specifically, since the reference point disappears in the subsequent operation, and the safety pin needs to be machined last, the coordinates of the safety pin are aligned with the reference point in advance in the program of the cnc milling machine 1.
In a third embodiment of the GN shearing type internal mixer rotor body processing method provided by the present invention, if the processing reference point is correct, the step of processing and forming according to a set program by using the numerically controlled milling machine 1 comprises:
referring to fig. 4, S70: root transition circle processing of the long edges 5 and the short edges 6: milling root transition circles of the long edges 5 and the short edges 6 according to a preset program by using the numerical control milling machine 1 and the first clamping chuck 3;
please refer to fig. 5, S80: processing of long edges 5 and short edges 6: processing and molding the prism bodies of the long prism 5 and the short prism 6 according to a preset program by using a numerical control milling machine 1 and a first clamping chuck 3;
referring to fig. 6, S90: roughly machining a semicircle: roughly machining and molding two arcs close to the technical spigot 7 according to a preset program by using the numerical control milling machine 1 and the first clamping chuck 3;
referring to fig. 7, S100: area rough machining: preliminarily processing the connecting positions of the cylindrical surface of the rotor body and the long edges 5 and the short edges 6 by using a numerical control milling machine 1 and a first clamping chuck 3;
referring to fig. 8, S110: rough machining of a base circle: roughly machining the surface of the cylinder of the rotor body by using a numerical control milling machine 1 and a first clamping chuck 3;
referring to fig. 9, S120: finish machining the root part of the ridge: manually judging whether the size of the machining tool 2 meets the precision requirement; if the size of the machining tool 2 meets the precision requirement, the connecting positions of the cylindrical surface of the rotor body and the long edges 5 and the short edges 6 are finely machined by using a numerically controlled milling machine 1 and a first clamping chuck 3; if the size of the machining tool 2 does not meet the precision requirement, the machining tool 2 is replaced and then the machining operation is performed.
Referring to fig. 10, S130: finish machining the base circle surface: manually judging whether the size of the machining tool 2 meets the precision requirement; if the size of the machining tool 2 meets the precision requirement, the numerical control milling machine 1 and the first clamping chuck 3 are used for carrying out finish machining on two arcs close to the technical spigot 7 and the surface of the cylinder of the rotor body.
Specifically, step S70 is performed first, and then step S80 is performed to prevent the feed amount from being increased and damaging the tool due to the abrupt change of the radian when the end of the long edge 5 or the short edge 6 is machined in the machining process; meanwhile, in step S120 and step S130, before the machining, an appropriate tool is selected for machining according to the size of the part, so as to ensure the machining precision.
In a fourth embodiment of the GN shear type internal mixer rotor body processing method according to the present invention, the step of finishing the base circle surface further comprises:
s140: milling a reference groove: drilling a reference groove at the technical spigot 7 to facilitate the positioning of the alloy in subsequent processing;
s150: drilling a reference point: drilling a reference point in the center of the reference groove;
s160: pre-drilling a safety pin hole: and drilling a safety pin hole at the safety pin hole designed on the rotor body according to the existing processing standard.
Specifically, in step S140, in order to ensure that the standard of the high-hardness alloy is uniform with the standard of the subsequent numerical milling, it is necessary to level the rotation axis of the component (the specific leveling position is any process spigot 7) to determine the origin of the standard of the subsequent numerical milling high-hardness alloy, where the groove depth = (outer diameter-inner diameter of the process spigot 7)/5, the depth range is 5mm to 10mm, the correction length is not less than 100mm, and the groove width is 20mm.
Further, in step S150, a welding wire reference point is required for welding the parts later, and a D10 center drill is used to drill a hole in the center of the reference groove, wherein the drilling depth is 5mm.
Further, in step S160, a safety pin hole having a diameter of 10mm and a depth of 20mm is drilled for alignment of a safety pin in a subsequent process.
In a fifth embodiment of the GN shear type internal mixer rotor body processing method according to the present invention, after the step of clamping the as-cast GN shear type internal mixer rotor body by the first clamping chuck 3 and the auxiliary clamping member 4, and before the step of determining the processing reference point, the method further comprises:
s170: the coaxiality of the two process spigots 7 at the two ends of the rotor body is checked;
s180: and if the coaxiality is unqualified, adjusting the first clamping chuck 3 and the auxiliary clamping piece 4 so that the two process spigots 7 at the two ends of the sub body meet the coaxiality requirement.
Specifically, in step S170, since each subsequent processing step needs to rotate the component, the coaxiality of the two process sockets 7 at the two ends of the rotor body is particularly critical, and the runout needs to be ensured within 0.1 mm.
In the third embodiment of the GN shearing type internal mixer rotor body processing method provided by the invention, in the step of roughly processing the base circle, the reserved allowance of the processing cutter 2 in the program design is 1.5 times of the casting allowance; while the row pitch setting of the machining tool 2 should be less than 50% of the tool diameter.
Specifically, since the accuracy is difficult to grasp during casting, the casting margin may be uneven, and the base circles of the process spigot 7 and the part may be non-concentric, the cutting procedure should be designed with a small amount of cutting margin to prevent the excessive feeding amount from damaging the tool (so-called occurrence of local blank cutting, and subsequent adjustment is performed after the entire arc surface is finished).
Further, taking the present invention as an example, the base circle casting allowance of the present invention is 10mm, and since the turning of the holder seam allowance (the process seam allowance 7) may cause the holder seam allowance (the process seam allowance 7) and the base circle datum to be eccentric, a high and low point of the casting allowance may occur, and the machining allowance is designed to be 15mm in view of the machining characteristics of the machining tool 2.
In the third embodiment of the GN shearing type internal mixer rotor body processing method, in the step of finishing the base circle surface, the processing tool 2 adopts a line cutting mode, and when a program is set, the center of the processing tool 2 is offset by 50% of the diameter of the processing tool 2.
Specifically, since the base circle surface is arc-shaped, if offset adjustment is not performed, the center top of the machining tool 2 may be caused.
In the fourth embodiment of the GN shearing type internal mixer rotor body processing method, in the step of milling the reference groove, the leveling length of the reference groove is not less than 100mm.
Preferably, in order to achieve the above object, the present invention further provides a GN shear type internal mixer rotor body processing device, which includes a numerically controlled milling machine 1, a control module, a first clamping chuck 3 and an auxiliary clamping member 4, wherein the first clamping chuck 3 is used for clamping one process spigot 7 of the internal mixer rotor body, the first clamping chuck 3 is also used for rotating the internal mixer rotor body, and the auxiliary clamping member 4 is used for clamping the other process spigot 7 of the internal mixer rotor body; the auxiliary clamp 4 comprises a second clamping chuck; the numerical control milling machine 1 is used for processing the surface of a rotor body of an internal mixer, and the control module controls the movement of the numerical control milling machine 1 according to a preset program.
Specifically, the first clamping chuck 3 and the second clamping chuck are gantry chucks, the gantry chucks are good in clamping effect, high in coaxiality, convenient to operate and high in cost.
Preferably, the auxiliary clamping member 4 further comprises a tip and a center frame, the tip is used for abutting against the process spigot 7 of the rotor body of the internal mixer, which is away from the first clamping chuck 3, and the center frame is used for rotatably supporting the process spigot 7 of the rotor body of the internal mixer, which is away from the first clamping chuck 3; the auxiliary clamping piece 4 further comprises an inner sleeve tool, and the inner sleeve tool is used for penetrating through the mounting space of the internal mixer rotor body to rotatably support the internal mixer rotor body.
Specifically, the cost is increased due to the clamping mode of the double chucks, so the invention also provides another two clamping modes, wherein one clamping mode is to utilize one chuck, one tip and the center frame for clamping, and the clamping mode needs one tip and the center frame; the other is that the inner sleeve tool (long shaft) is used for supporting in a rotating mode, the cost is the lowest, the inner sleeve tool can be bent due to the fact that the weight of a part is large, and the inner sleeve tool can be selected and used according to production conditions.
Referring to fig. 11, in a sixth embodiment of the method for processing a rotor body of a GN shear type internal mixer according to the present invention, after all the processing steps are completed, the method further includes:
s190: scanning the rotor body of the internal mixer to obtain a size information model of the rotor body of the internal mixer;
s200: and inputting the size information model of the rotor body of the internal mixer obtained by scanning into Geomagic Control software for data analysis.
Furthermore, ZGScan is selected as the scanner.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. The GN shearing type internal mixer rotor body processing method is characterized in that GN shearing type internal mixer rotor body processing equipment is adopted, wherein the GN shearing type internal mixer rotor body processing equipment comprises a numerical control milling machine, a control module, a first clamping chuck and an auxiliary clamping piece, the first clamping chuck is used for clamping one process spigot of an internal mixer rotor body, the first clamping chuck is also used for rotating the internal mixer rotor body, and the auxiliary clamping piece is used for clamping the other process spigot of the internal mixer rotor body; the GN shearing type internal mixer rotor body processing method comprises the following steps: clamping two ends of a cast GN shearing type internal mixer rotor body through a first clamping chuck and an auxiliary clamping piece; determining a processing reference point: moving a central drill of the numerical control milling machine to a long edge central point of a rotor body of the internal mixer, then drilling a reference hole to determine the origin of a coordinate system of the rotor body, and taking the origin of the coordinate system as a processing reference point; verifying the machining reference point: respectively carrying out axial processing on the excircle of a long edge and axial processing on the excircle of a short edge according to a rotor body coordinate system, then trial-cutting the edge tops of the long edge and the short edge, if two trial-cut lines on the same edge obtained by trial-cutting meet the parallelism requirement, and the mutual allowance distribution of two long edges or two short edges arranged oppositely meets the requirement, then a processing reference point is correct, if the two trial-cut lines on the same edge obtained by trial-cutting do not meet the parallelism requirement, or the two long edges or two short edges arranged oppositely do not meet the requirement on the mutual allowance distribution, then the processing reference point is wrong; if the machining datum point is correct, machining and forming according to a set program by using a numerical control milling machine; if the processing reference point is wrong, manually adjusting the rotation angle of the first clamping chuck, then determining the processing reference point again, and verifying the processing reference point until the processing reference point is correct;
if the machining datum point is correct, the step of machining and forming according to a set program by using a numerical control milling machine comprises the following steps:
processing root transition circles of the long edges and the short edges: milling root transition circles of the long edges and the short edges according to a preset program by using a numerical control milling machine and a first clamping chuck;
processing long edges and short edges: processing and molding the long-edge and short-edge prisms according to a preset program by using a numerical control milling machine and a first clamping chuck;
roughly machining a semicircle: roughly machining and molding two arcs close to the technical spigot according to a preset program by using a numerical control milling machine and a first clamping chuck;
area rough machining: performing primary processing on the connecting positions of the cylindrical surface of the rotor body and the long edges and the short edges by using a numerical control milling machine and a first clamping chuck;
rough machining of a base circle: roughly machining the surface of the cylinder of the rotor body by using a numerical control milling machine and a first clamping chuck;
and (3) fine machining of the root part of the ridge: manually judging whether the size of the machining cutter meets the precision requirement or not; if the size of the machining cutter meets the precision requirement, the connecting position of the cylindrical surface of the rotor body and the long edge and the short edge is finely machined by using a numerical control milling machine and a first clamping chuck; if the size of the machining cutter does not meet the precision requirement, the machining operation is carried out after the machining cutter is replaced;
finish machining the base circle surface: manually judging whether the size of the machining cutter meets the precision requirement or not; if the size of the machining cutter meets the precision requirement, the numerical control milling machine and the first clamping chuck are used for carrying out finish machining on two arcs close to the technical spigot and the surface of the cylinder of the rotor body.
2. A GN shear type internal mixer rotor body processing method as claimed in claim 1, wherein said step of determining a processing reference point further comprises:
confirming the pin coordinate system: and moving the cutter of the numerical control milling machine to a scribing point of the safety pin, recording the position information of the cutter at the moment as a reference point of the safety pin, and recording the rotating angle of the first clamping chuck at the moment.
3. A GN shear type internal mixer rotor body processing method as claimed in claim 1, wherein said step of finishing the base circular surface further comprises, after:
milling a reference groove: drilling a reference groove at the technical seam allowance so as to facilitate the subsequent alloy processing positioning;
drilling a reference point: drilling a reference point in the center of the reference groove;
pre-drilling a safety pin hole: and drilling a safety pin hole at the safety pin hole designed on the rotor body according to the existing processing standard.
4. A GN shear type internal mixer rotor body processing method as claimed in claim 1, further comprising checking coaxiality of two process spigots at both ends of the rotor body after said step of clamping the as-cast GN shear type internal mixer rotor body by the first clamping chuck and the auxiliary clamping member and before said step of determining the processing reference point;
and if the coaxiality is unqualified, adjusting the first clamping chuck and the auxiliary clamping piece so that the two process rabbets at the two ends of the sub body meet the coaxiality requirement.
5. A GN shear type internal mixer rotor body processing method as claimed in claim 1, wherein in said step of roughly processing the base circle, the allowance of the processing cutter in the programming should be 1.5 times of the casting allowance; meanwhile, the row spacing of the machining cutter is set to be less than 50% of the diameter of the cutter.
6. A method as claimed in claim 1, wherein in said step of finishing the base circular surface, the machining tool is a row-cut type of cutting tool, and the center of the machining tool is offset by 50% of the diameter of the machining tool when the program is set.
7. A GN shear type internal mixer rotor body processing method as claimed in claim 3, wherein said step of milling the reference grooves has a leveling length of not less than 100mm.
8. A GN shear type internal mixer rotor body processing apparatus, characterized in that processing is performed using the GN shear type internal mixer rotor body processing method as claimed in any one of claims 1 to 7, the GN shear type internal mixer rotor body processing apparatus comprising a numerically controlled milling machine, a control module, a first clamping chuck for clamping one of the process spigot of the internal mixer rotor body, the first clamping chuck also being used for rotating the internal mixer rotor body, and an auxiliary clamping member for clamping the other process spigot of the internal mixer rotor body; the auxiliary clamping piece comprises a second clamping chuck; the numerical control milling machine is used for processing the surface of the rotor body of the internal mixer, and the control module controls the movement of the numerical control milling machine according to a preset program.
9. A GN shear type internal mixer rotor body tooling apparatus as claimed in claim 8, wherein said auxiliary clamps further include apexes for abutting against process tangs of said internal mixer rotor body facing away from said first clamp chuck and a central frame for rotatably supporting said process tangs of said internal mixer rotor body facing away from said first clamp chuck; the auxiliary clamping piece further comprises an inner sleeve tool, and the inner sleeve tool is used for penetrating through the mounting space of the internal mixer rotor body to rotatably support the internal mixer rotor body.
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