CN111940806A - Machining device and method for dovetail groove of jaw plate of seamless steel tube cold-drawing machine - Google Patents
Machining device and method for dovetail groove of jaw plate of seamless steel tube cold-drawing machine Download PDFInfo
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- CN111940806A CN111940806A CN201910414358.1A CN201910414358A CN111940806A CN 111940806 A CN111940806 A CN 111940806A CN 201910414358 A CN201910414358 A CN 201910414358A CN 111940806 A CN111940806 A CN 111940806A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D1/00—Planing or slotting machines cutting by relative movement of the tool and workpiece in a horizontal straight line only
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D7/00—Planing or slotting machines characterised only by constructional features of particular parts
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Abstract
A processing device and a method for a jaw plate dovetail groove of a seamless steel pipe cold-drawing machine are disclosed, wherein the processing device comprises: the supporting rack is located a horizontal planer workstation side, includes: the two supporting plates are arranged in parallel, each supporting plate is in a right-angle fan shape, one side edge of each supporting plate is an upper arc, the lower part of each supporting plate is a vertical surface, the other side edge of each supporting plate is an inclined plane forming an acute angle with the side edge, and the acute angle is 11-20 degrees; the supporting beam is arranged between the upper parts of the two supporting plates, and two ends of the supporting beam are connected to the inner side surfaces at the right angles of the two supporting plates; the middle of the supporting beam is provided with an adjusting screw hole; the adjusting screw is arranged in an adjusting screw hole in the middle of the supporting beam; the positioning plate is vertically connected to the lower parts of the fan-shaped cambered surfaces of the two supporting plates; the positioning plate is fixed on the side surface of the workbench of the horizontal planer through bolts. The invention realizes accurate and rapid correction and positioning of the planing processing of the dovetail groove of the jaw plate, synchronously optimizes and perfects the planing processing process of the dovetail groove, and can meet the technical requirements of the planing processing of the dovetail groove of the jaw plate.
Description
Technical Field
The invention relates to seamless steel tube processing equipment, in particular to a device and a method for processing a dovetail groove of a jaw plate of a seamless steel tube cold-drawing machine.
Background
Seamless steel pipes are common metallurgical metal products. After the seamless steel pipe is subjected to high-temperature extrusion or perforation deformation processing, the seamless steel pipe is subjected to deformation processing at normal temperature by adopting two modes of cold drawing and cold rolling to prepare a finished seamless steel pipe meeting the related technical requirements. The cold drawing processing technology of the seamless steel tube is produced before the cold rolling processing technology, and the cold drawing seamless steel tube has the advantages of good concentricity (coaxiality and straightness), strong capability of eliminating the defects remained in hot processing such as surface spots, pits and the like, simple and compact equipment structure, low investment cost and the like, is widely applied to the manufacture of single hydraulic cylinders and engineering machinery oil cylinders at present, and has wide market application prospect.
The cold drawing machine for seamless steel pipe is used to draw ferrous and non-ferrous metal bar material at normal temperature and to secondary process the hot rolled and extruded pierced billet, and is used in producing small diameter, precise, thin wall and high mechanical performance pipe. The seamless steel tube cold drawing machine mainly comprises a drawing mechanism, a transmission mechanism, a lathe bed supporting mechanism, a die holder mechanism, a feeding and blanking mechanism, an electric control system, a hydraulic system, a pneumatic system and the like. The drawing mechanism is a drawing trolley and an auxiliary device thereof and mainly comprises a trolley body, wheels, chain hooks, springs, cylindrical pins, a rocker arm frame, a jaw plate, an insert and the like. The working principle is that the embedded piece arranged in the dovetail groove of the jaw plate bites the top end of the blank pipe, the rocker arm frame drives the chain hook to fall into the continuous hole of the transmission chain, and the blank pipe is driven by the transmission chain (or driven by a hydraulic system) to pass through a concentric reducing ring consisting of an inner die and an outer die, so that the drawing deformation processing purpose of the seamless steel pipe under the normal temperature working condition is realized. By arranging different inner dies and outer dies and forming concentric reducing rings by combining the inner dies and the outer dies, seamless steel pipes with different specifications can be drawn and processed.
In the cold drawing preparation process of the seamless steel tube, the main bearing loads (stress points) for the drawing mechanism are the gripping part of the front end jaw plate and the insert piece on the blank tube and the gripping contact part of the rear end chain hook and the transmission chain. The force borne by the chain hook is the force which is the drawing force and is the force that the transmission chain pulls (drives) the drawing trolley to overcome the metal deformation resistance of the blank pipe and make horizontal displacement. What the jaw plate and the insert plate are combined to bear is the occlusal force to the front end of the blank pipe after the chain hook is tightened, the occlusal force must be higher than the drawing force, the locking of the blank pipe in the cold-drawing deformation process can be ensured, and once the occlusal force is insufficient or instantaneously lost, the locking of the blank pipe cannot be ensured, so that the front end of the blank pipe escapes from the insert plate, and the drawing processing fails. Therefore, by examining the structural characteristics, the stress characteristics, the working principle and the like of the drawing mechanism of the cold drawing machine, the dovetail groove formed by the jaw plate and the embedded piece is the most easily worn and damaged under the working condition of bearing load, and the wear of the dovetail groove of the jaw plate in the production practice is one of the main reasons for drawing faults of the seamless steel pipe.
The drawing mechanism jaw plate of the seamless steel tube cold drawing machine is different in size according to different drawing specifications, but consists of a male body (figure 1) and a female body (figure 2), is used in pair, and is frequently operated under the high-strength working condition of being directly born by the jaw plate and larger than the drawing force, so that the structural strength requirement is high, the weight is large, the jaw plate is usually prepared by medium carbon steel and is of a sector structure in a curved ruler shape, a dovetail groove is arranged on the short side of the curved ruler shape, and the dovetail groove has the function of installing an embedded piece. Because the insert piece is a contact piece with the blank pipe, the insert piece is made of a material subjected to heat treatment and quenching, and the dovetail groove part of the jaw plate is not subjected to heat treatment, so that the dovetail groove part is worn after the insert piece is contacted with the dovetail groove part, and the jaw plate after the dovetail groove is worn is usually repaired in a surfacing mode.
The dovetail groove of the jaw plate is machined by adopting a horizontal (ox head) planer no matter new product preparation or repair after overlaying, and the reason is that the machining is convenient and fast and the cost is low. If a digital processing technology is adopted, the technology of preparing, cutting and processing a dovetail groove through a numerical control machine (or a processing center) is feasible, the processing efficiency and the processing precision can be effectively guaranteed, but the cost is high, and the method is only suitable for preparing the jaw plates in large batch. In production practice, enterprises for cold-drawing processing of seamless steel pipes need to repair dovetail grooves of jaw plates of small blanks and multiple specifications or prepare a small amount of jaw plates, so that the processing of a horizontal (shaping) planer is processing equipment widely adopted by the enterprises for cold-drawing processing of seamless steel pipes at present. The prior preparation process of the jaw plate dovetail groove (planing and repairing after new product planing and overlaying) generally adopts a planing preparation → a jaw plate machine on → a correction station → planing and processing → inspection → a machine warehouse-off method. The main characteristic is that because the weight of the jaw plate is large, taking a 65t cold drawing machine as an example, the weight of a single piece of the jaw plate exceeds 50kg, the jaw plate cannot be carried by manpower and can only be lifted and operated by a crane, and the correction station on a horizontal (ox head) planer also depends on the assistance of the crane, so that certain defects exist in the prior planing of the dovetail groove of the jaw plate, namely:
1) the jaw plate is not easy to clamp, and potential safety hazards exist: because of the particularity of the shape of the jaw plate, when the jaw plate is machined by a horizontal (ox head) planer, the jaw plate is clamped by using flat pliers, and because of the requirement of a dovetail groove planing machining process, the gravity center of the jaw plate does not coincide with a clamping (positioning) point during clamping, the fan-shaped long edge of the jaw plate inclines for about 15 degrees, and the jaw plate is easy to move or even overturn under the action of gravity, so that certain occupational health risk potential exists, and certain accident potential also exists for planing equipment.
2) The time of the hoisting machinery occupied during the planing and machining is long, and the operation in the same work area is not facilitated: because the jaw plate has the hidden danger of overturning, in order to ensure the safety of equipment and operators, a hoisting machine suspension mode is usually adopted for auxiliary support, namely after the hoisting machine hoists the jaw plate to be operated (a horizontal planer), the jaw plate is suspended by a steel wire rope, on one hand, the working position correction of a dovetail groove is performed by up-down micro-motion adjustment of the steel wire rope, on the other hand, certain protection effect is performed after the working position is corrected and clamped and positioned by flat tongs, once the clamping point is abnormal, the jaw plate can not overturn due to the protection effect of the steel wire rope, so that the hoisting machine occupies a long time in the process of planing the dovetail groove, and the production of the whole machining working area can be influenced.
3) The clamping correction station of the jaw plate is not easy: especially, after overlaying welding, the opening part at the upper part of the dovetail groove is left by welding, so that leveling and alignment are difficult, operators can only knock the top of the jaw plate under the working condition of pre-tightening of the flat tongs, alignment operation is realized through angle change, and the operation efficiency is not high.
In summary, although the conventional machining method for planing and preparing the dovetail groove of the jaw plate of the cold-drawing machine can meet the technical requirements, the method has the defects of safety, efficiency and the like, and it is urgently needed to improve the operation efficiency, reduce the occupation of the hoisting machinery and meet the goal of ordered production in a machining work area on the basis of ensuring safety by carrying out technical improvement on the conventional machining process method.
Disclosure of Invention
The invention aims to design a device and a method for machining a jaw plate dovetail groove of a seamless steel tube cold-drawing machine, which can realize accurate and rapid correction and positioning of planing machining of the jaw plate dovetail groove, synchronously optimize and perfect a dovetail groove planing machining process, have smooth working procedures and compact process and can meet the technical requirements of machining the jaw plate dovetail groove.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the utility model provides a processingequipment that is used for seamless steel pipe cold drawing machine jaw board dovetail, sets up on horizontal (ox head) planer workstation, and it includes: the supporting rack set up in a horizontal planer workstation side, it includes: the two supporting plates are arranged in parallel, each supporting plate is in a right-angle fan shape, one side edge of each supporting plate is an upper arc, the lower part of each supporting plate is a vertical surface, the other side edge of each supporting plate is an inclined plane forming an acute angle with the side edge, and the acute angle is 11-20 degrees; the supporting beam is arranged between the upper parts of the two supporting plates, and two ends of the supporting beam are connected to the inner side surfaces at the right angles of the two supporting plates; the middle of the supporting beam is provided with an adjusting screw hole; the adjusting screw is arranged in an adjusting screw hole in the middle of the supporting beam; the positioning plate is vertically connected to the lower parts of the fan-shaped cambered surfaces of the two supporting plates; the positioning plate is fixed on the side surface of the workbench of the horizontal planer through a bolt.
Preferably, the adjusting screw consists of a screw and a round rod; the screw is in a concentric different-diameter triple step-shaped cylindrical structure, the end part of a small-diameter cylinder of the step-shaped cylinder is processed into a fillet, the outer circumferential surface of a middle-diameter cylinder is processed with a triangular thread, the outer circumferential surface of a large-diameter cylinder is centrally processed with a round hole, and the axial lead of the round hole is perpendicular to and intersected with the axial lead of the screw; the round bar is of a slender cylindrical structure and is inserted into the screw round hole, and the two ends of the round bar are provided with thick piers.
The invention relates to a method for processing a jaw plate dovetail groove of a seamless steel pipe cold-drawing machine by using a processing device, which comprises the following steps:
1) preparation for planing
Cleaning a machined surface by using a jaw plate;
2) mounting and positioning of jaw plate on machine
Vertically hoisting the jaw plate to the position above a horizontal planer working platform by adopting a hoisting machine, gradually descending at a constant speed until the jaw plate is integrally inserted between two supporting plates of a processing device supporting frame, and integrally placing a jaw of the jaw plate, namely the region where the dovetail groove is located, into flat tongs on the horizontal planer working platform for pre-tightening;
3) correction machining station
Correcting the angle positions of a dovetail groove to be planed and processed on a jaw plate and a horizontal planer working platform by screwing an adjusting screw, and performing alignment correction on a dovetail groove processing surface, wherein the adjusting screw rotates clockwise, the inclined surface of the jaw plate deflects inwards, the adjusting screw rotates anticlockwise, and the inclined surface of the jaw plate deflects outwards; when the extension length of a screw rod of the contact surface of the adjusting screw and the jaw plate is 3.1-3.5 mm, the contact surface, namely the back surface of the 32-jaw plate and the two support plates of the processing device support frame form an obtuse angle of 155 degrees; when the extension length of the screw rod of the screw is 1.0-1.5mm, the contact surface of the jaw plate and the two support plates of the processing device support frame form an obtuse angle of 132-140 degrees; the two angles are the optimal stations for planing the left dovetail groove and the right dovetail groove of the jaw plate; when the processing station of the dovetail groove of the jaw plate meets the planing requirement, a hexagon nut on an adjusting screw is screwed to fix the dovetail groove, and meanwhile, the flat tongs are fixed by applying force;
4) planing
Planing the dovetail groove according to a set cutting speed v and a set feeding amount including a cutting amount f and a back cutting amount a, and performing rough planing and fine planing, wherein the cutting speed v of rough planing is 55-65 times/min, the cutting amount f is 1.0-1.5mm, and the back cutting amount a is 0.5-1.0 mm; meanwhile, a special cutter with angle deflection cutter grinding is adopted when a dovetail part is planed, the cutting speed v of finish planing is 45-55 times/min, the cutting quantity f is 0.5-1.0 mm, and the back cutting quantity a is 0.3-0.5 mm;
5) examination of
Measuring and inspecting the dovetail groove of the jaw plate after finish planing by using a measuring tool and a sample plate, determining whether the dovetail groove meets the technical requirements, if the dovetail groove is qualified, preparing for taking off the machine, if the dovetail groove is not qualified, carrying out finish planing and cutting, and if the dovetail groove is out of tolerance, taking off the machine for surfacing again;
6) machine unloading spare warehouse
The lifting machine is adopted to lift the jaw plate which is planed and meets the technical requirements away from the machine, the flat tongs are loosened, the adjusting screw is withdrawn, the whole jaw plate is lifted away from the horizontal planer working platform, burrs are corrected on the machined part, and the jaw plate is conveyed to a side warehouse of the machine for standby after being packaged.
The invention has the beneficial effects that:
1. the design is reasonable, the process is smooth, the process is compact, and the technical requirements of the dovetail groove processing of the jaw plate of the drawing trolley of the seamless steel tube cold-drawing machine can be met;
2. the adjustable supporting and positioning device has the advantages of compact structure, easy processing and preparation, accurate positioning, stable and effective supporting, no need of long-time pre-tightening protection of hoisting machinery, and convenience for production organization in the same working area;
3. the labor intensity is reduced, the occupational safety risk and the equipment hidden danger are reduced, the improvement investment is less, the cost is low, the field implementation and application are easy, the cost performance is better, and the intrinsic safety construction of the equipment is promoted;
4. through the screwing motion of the adjusting screw, the alignment and correction operation of the planing surface of the jaw plate is convenient, quick, safe, reliable, practical and efficient;
5. the adjustable supporting and positioning device is organically combined with the flat tongs, so that the overturning hidden danger caused by the deviation of the center of gravity of the tong opening plate and the clamping positioning point is eliminated, and the planing efficiency and the quality of a dovetail groove are improved;
6. the universal milling cutter has strong universality, improves the processing mode of a horizontal (shaping) planer of similar mechanical parts in the industry, and has certain reference and application values.
7. The method is suitable for single-piece or small-batch processing preparation or repair of seamless steel pipe production enterprises, and can meet the dovetail groove processing of cold-drawing machine jaw plates of various specifications (such as models of 8t, 10t, 20t, 45t, 65t and the like).
Drawings
FIG. 1 is a schematic structural view of a jaw plate of a cold drawing machine;
FIG. 2 is a schematic structural view of a jaw plate of a cold drawing machine;
FIG. 3 is a schematic structural diagram of the device for processing the dovetail groove of the jaw plate of the seamless steel tube cold-drawing machine of the present invention;
FIG. 4 is a right side view of FIG. 3;
FIG. 5 is a top view of FIG. 4;
FIG. 6 is a schematic structural view of an adjusting screw in the processing apparatus according to the present invention;
FIG. 7 is a right side view of FIG. 6;
FIG. 8 is a left side view of FIG. 6;
FIG. 9 is a schematic view of the process of the present invention, FIG. 1;
FIG. 10 is a schematic view of the process of the present invention, FIG. 2.
Detailed Description
Referring to fig. 1 to 10, the device for processing the dovetail groove of the jaw plate of the seamless steel tube cold-drawing machine, which is provided on the horizontal planer workbench, comprises:
supporting rack 1, set up in 1 side of horizontal planer workstation, it includes:
the two supporting plates 11 and 11 'are arranged in parallel, the supporting plates 11 and 11' are in a right-angle fan shape, one side edge of each supporting plate is an arc at the upper part, the lower part of each supporting plate is a vertical surface, the other side edge of each supporting plate is an inclined surface forming an acute angle with the side edge, and the acute angle is 11-20 degrees;
a supporting beam 12 disposed between the upper portions of the two supporting plates 211, both ends of which are connected to the inner side surfaces at the right angles of the two supporting plates 11, 11'; an adjusting screw hole is arranged in the middle of the supporting beam 12;
the adjusting screw 2 is arranged in an adjusting screw hole in the middle of the supporting cross beam 12;
the positioning plate 3 is vertically connected to the lower parts of the fan-shaped cambered surfaces of the two supporting plates 11 and 11'; the positioning plate 3 is fixed on the side surface of the workbench of the horizontal planer through bolts.
Referring to fig. 8 to 10, the adjusting screw 2 is composed of a screw 21 and a round rod 22; the screw 21 is in a concentric different-diameter triple step-shaped cylindrical structure, the end part of a small-diameter cylinder of the step-shaped cylindrical body is processed into a fillet, the outer circumferential surface of a middle-diameter cylinder is processed with a triangular thread, the outer circumferential surface of a large-diameter cylinder is centrally processed with a round hole, and the axial lead of the round hole is perpendicular to and intersected with the axial lead of the screw; the round rod 22 is of a slender cylindrical structure, is inserted into the round hole of the screw 21, and is provided with thick piers at two ends of the round rod 22.
The invention relates to a method for processing a dovetail groove of a seamless steel pipe cold-drawing machine jaw plate by using a processing device, which comprises the following steps:
1) preparation for planing
Cleaning a machined surface by using a jaw plate;
2) mounting and positioning of jaw plate on machine
Vertically hoisting the jaw plate 100 to the position above a horizontal planer working platform 200 by adopting a hoisting machine, gradually descending at a constant speed until the jaw plate 100 is integrally inserted between two supporting plates of a processing device supporting frame, and integrally placing jaws of the jaw plate, namely the region where the dovetail grooves are located, into flat tongs 300 on the horizontal planer working platform for pre-tightening;
3) correction machining station
Correcting the angle positions of a dovetail groove to be planed and processed on a jaw plate and a horizontal planer working platform by screwing an adjusting screw, and performing alignment correction on a dovetail groove processing surface, wherein the adjusting screw rotates clockwise, the inclined surface of the jaw plate deflects inwards, the adjusting screw rotates anticlockwise, and the inclined surface of the jaw plate deflects outwards; when the extension length of a screw rod of the contact surface of the adjusting screw and the jaw plate is 3.1-3.5 mm, the contact surface, namely the back surface of the 32-jaw plate and the two support plates of the processing device support frame form an obtuse angle of 155 degrees; when the extension length of the screw rod of the screw is 1.0-1.5mm, the contact surface of the jaw plate and the two support plates of the processing device support frame form an obtuse angle of 132-140 degrees; the two angles are the optimal stations for planing the left dovetail groove and the right dovetail groove of the jaw plate; when the processing station of the dovetail groove of the jaw plate meets the planing requirement, a hexagon nut on an adjusting screw is screwed to fix the dovetail groove, and meanwhile, the flat tongs are fixed by applying force;
4) planing
Planing the dovetail groove according to a set cutting speed v and a set feeding amount including a cutting amount f and a back cutting amount a, and performing rough planing and fine planing, wherein the cutting speed v of rough planing is 55-65 times/min, the cutting amount f is 1.0-1.5mm, and the back cutting amount a is 0.5-1.0 mm; meanwhile, a special cutter with angle deflection cutter grinding is adopted when a dovetail part is planed, the cutting speed v of finish planing is 45-55 times/min, the cutting quantity f is 0.5-1.0 mm, and the back cutting quantity a is 0.3-0.5 mm;
5) examination of
Measuring and inspecting the dovetail groove of the jaw plate after finish planing by using a measuring tool and a sample plate, determining whether the dovetail groove meets the technical requirements, if the dovetail groove is qualified, preparing for taking off the machine, if the dovetail groove is not qualified, carrying out finish planing and cutting, and if the dovetail groove is out of tolerance, taking off the machine for surfacing again;
6) machine unloading spare warehouse
The lifting machine is adopted to lift the jaw plate which is planed and meets the technical requirements away from the machine, the flat tongs are loosened, the adjusting screw is withdrawn, the whole jaw plate is lifted away from the horizontal planer working platform, burrs are corrected on the machined part, and the jaw plate is conveyed to a side warehouse of the machine for standby after being packaged.
Example one
Planing a dovetail groove of a new product of a jaw plate of a drawing trolley of a 45t cold drawing machine:
the device and the process method provided by the invention are implemented by adopting a BC6030 squaring machine, when a new dovetail groove of a jaw plate of a 45t cold-drawing machine is planed and processed, the planing is carried out according to a set process method, and the device comprises six steps of planing preparation → machining and positioning on the jaw plate → correction processing station → planing processing → inspection → unloading a machine preparation warehouse and the like. Namely:
1) preparing planing: jaw plates clean the work surface, planer preparation, tool preparation (sharpening), gauge preparation, tooling equipment (mounting the machining device in place), and the like.
2) Installing and positioning the jaw plate on a machine: the 1 piece of the jaw plate is vertically hoisted to the upper part of a horizontal (ox head) planer working platform by adopting a hoisting machine, gradually descends at a constant speed until the jaw plate is integrally inserted between two supporting plates of a supporting frame, and integrally puts the jaw part (the area where a dovetail groove is positioned) of the jaw plate into a flat tongs for pre-tightening, and at the moment, the hoisting machine can be loosened.
3) Correcting a processing station: correcting the angle positions of a dovetail groove to be planed and processed by a jaw plate and a planer working platform by screwing an adjusting screw of an adjustable supporting and positioning device, and performing alignment correction on the processing surface of the dovetail groove, wherein the adjusting screw rotates clockwise, the inclined plane of the jaw plate deflects slightly inwards, the adjusting screw rotates anticlockwise, and the inclined plane of the jaw plate deflects slightly outwards; the calculation model is that when the extension length of a screw rod of a contact surface of an adjusting screw and a jaw plate is 3.4mm, an obtuse angle of 150 degrees is formed between the contact surface (back surface) of the jaw plate and a supporting plate of a supporting frame; when the extension length of the screw rod of the screw is 1.3mm, an obtuse angle of 137 degrees is formed between the contact surface (back surface) of the jaw plate and the supporting plate of the supporting frame; the two angles are the optimal stations for planing the left dovetail groove and the right dovetail groove of the jaw plate; when the processing station of the dovetail groove of the jaw plate meets the planing requirement, the hexagon nut on the adjusting screw is screwed to fix the dovetail groove, and meanwhile, the flat tongs are fixed by applying force.
4) Planing: planing the dovetail groove according to a set cutting speed v and a set feed amount (cutting amount f and back cutting amount a), and performing rough planing and fine planing, wherein the cutting speed v of rough planing is 60-65 times/min, the cutting amount f is 1.0-1.5mm, and the back cutting amount a is 0.5-1.0 mm; meanwhile, a special cutter with angle deflection cutter grinding is adopted when the dovetail part is planed, the cutting speed v of finish planing is 50-55 times/min, the cutting quantity f is 0.5-0.8 mm, and the back cutting quantity a is 0.3-0.4 mm; the angle adjustment of the working platform and the adjustable supporting device drive the jaw plate to synchronously rotate, and the inner plane of the wedge angle of the dovetail groove is processed until the width and the angle of the dovetail groove meet the technical requirements; the rough planing and the fine planing are both provided with intermediate measurement steps.
5) And (4) checking: and (3) measuring and checking the dovetail groove of the jaw plate after finish planing by using a special measuring tool and a sample plate, confirming whether the dovetail groove meets the technical requirements, performing off-machine preparation if the dovetail groove is qualified, performing finish planing and cutting if the dovetail groove is not qualified, and performing re-planing and machining after surfacing if the dovetail groove is out of the machine and is not qualified.
6) Preparing a stock by machine: the method comprises the steps of hoisting a clamp plate which is planed and meets the technical requirements by a hoisting machine to be lifted and separated from the machine, loosening flat-nose pliers after a steel wire rope is pre-tightened, screwing a loosened hexagon nut, anticlockwise rotating to withdraw an adjusting screw, lifting the whole clamp plate to be separated from a horizontal (ox-head) planer working platform, correcting burrs of a machined part, packaging and then delivering to a warehouse beside the machine.
Example two
And (3) planing a dovetail groove of the drawn trolley jaw plate surfacing repair piece of the 65t cold drawing machine:
the device and the process method provided by the invention are implemented by adopting a BC6030 squaring machine, and when the dovetail groove of the overlaying repair piece of the jaw plate of the 65t cold-drawing machine is planed, the planing is carried out according to a set process method, and the planing is prepared, the installing and positioning on the jaw plate is → the correcting and processing station is → the planing is carried out, the inspection is carried out, and the like. Namely:
1) preparing planing: jaw plates clean the work surface, planer preparation, tool preparation (sharpening), gauge preparation, tooling equipment (mounting the machining device in place), and the like.
2) Installing and positioning the jaw plate on a machine: the 1 piece of the jaw plate is vertically hoisted to the upper part of a horizontal (ox head) planer working platform by adopting a hoisting machine, and gradually descends at a constant speed until the jaw plate is integrally inserted between two supporting plates of a supporting frame of a processing device, and the jaw part (the area where a dovetail groove is located) of the jaw plate is integrally placed into a flat tongs for pre-tightening, and then the hoisting machine can be loosened.
3) Correcting a processing station: correcting the angle positions of a dovetail groove to be planed and processed by a jaw plate and a planer working platform by screwing an adjusting screw of an adjustable supporting and positioning device, and performing alignment correction on the processing surface of the dovetail groove, wherein the adjusting screw rotates clockwise, the inclined plane of the jaw plate deflects slightly inwards, the adjusting screw rotates anticlockwise, and the inclined plane of the jaw plate deflects slightly outwards; the calculation model is that when the extension length of a screw rod of a contact surface of an adjusting screw and a jaw plate is 3.4mm, an obtuse angle of 150 degrees is formed between the contact surface (back surface) of the jaw plate and a supporting plate of a supporting frame; when the extension length of the screw rod of the screw is 1.3mm, an obtuse angle of 137 degrees is formed between the contact surface (back surface) of the jaw plate and the supporting plate of the supporting frame; the two angles are the optimal stations for planing the left dovetail groove and the right dovetail groove of the jaw plate; when the processing station of the dovetail groove of the jaw plate meets the planing requirement, the hexagon nut on the adjusting screw is screwed to fix the dovetail groove, and meanwhile, the flat tongs are fixed by applying force.
4) Planing: planing the dovetail groove according to a set cutting speed v and a set feed amount (cutting amount f and back cutting amount a), and performing rough planing and fine planing, wherein the cutting speed v of rough planing is 55-60 times/min, the cutting amount f is 1.0-1.5mm, and the back cutting amount a is 0.5-1.0 mm; meanwhile, a special cutter with angle deflection cutter grinding is adopted when the dovetail part is planed, the cutting speed v of finish planing is 45-50 times/min, the cutting quantity f is 0.5-0.8 mm, and the back cutting quantity a is 0.3-0.4 mm; the angle adjustment of the working platform and the adjustable supporting device drive the jaw plate to synchronously rotate, and the inner plane of the wedge angle of the dovetail groove is processed until the width and the angle of the dovetail groove meet the technical requirements; the rough planing and the fine planing are both provided with intermediate measurement steps.
5) And (4) checking: and (3) measuring and checking the dovetail groove of the jaw plate after finish planing by using a special measuring tool and a sample plate, confirming whether the dovetail groove meets the technical requirements, performing off-machine preparation if the dovetail groove is qualified, performing finish planing and cutting if the dovetail groove is not qualified, and performing re-planing and machining after surfacing if the dovetail groove is out of the machine and is not qualified.
6) Preparing a stock by machine: the method comprises the steps of hoisting a clamp plate which is planed and meets the technical requirements by a hoisting machine to be lifted and separated from the machine, loosening flat-nose pliers after a steel wire rope is pre-tightened, screwing a loosened hexagon nut, anticlockwise rotating to withdraw an adjusting screw, lifting the whole clamp plate to be separated from a horizontal (ox-head) planer working platform, correcting burrs of a machined part, packaging and then delivering to a warehouse beside the machine.
Claims (3)
1. The utility model provides a processingequipment that is used for seamless steel pipe cold drawing machine jaw board dovetail, sets up on horizontal planer workstation, its characterized in that includes:
the supporting rack set up in a horizontal planer workstation side, it includes:
the two supporting plates are arranged in parallel, each supporting plate is in a right-angle fan shape, one side edge of each supporting plate is an upper arc, the lower part of each supporting plate is a vertical surface, the other side edge of each supporting plate is an inclined plane forming an acute angle with the side edge, and the acute angle is 11-20 degrees;
the supporting beam is arranged between the upper parts of the two supporting plates, and two ends of the supporting beam are connected to the inner side surfaces at the right angles of the two supporting plates; the middle of the supporting beam is provided with an adjusting screw hole;
the adjusting screw is arranged in an adjusting screw hole in the middle of the supporting beam;
the positioning plate is vertically connected to the lower parts of the fan-shaped cambered surfaces of the two supporting plates; the positioning plate is fixed on the side surface of the workbench of the horizontal planer through a bolt.
2. The processing device for the dovetail groove of the jaw plate of the seamless steel tube cold-drawing machine according to claim 1, wherein the adjusting screw is composed of a screw and a round rod; the screw is in a concentric different-diameter triple step-shaped cylindrical structure, the end part of a small-diameter cylinder of the step-shaped cylinder is processed into a fillet, the outer circumferential surface of a middle-diameter cylinder is processed with a triangular thread, the outer circumferential surface of a large-diameter cylinder is centrally processed with a round hole, and the axial lead of the round hole is perpendicular to and intersected with the axial lead of the screw; the round bar is of a slender cylindrical structure and is inserted into the screw round hole, and the two ends of the round bar are provided with thick piers.
3. A method for processing a dovetail groove of a jaw plate of a seamless steel pipe cold-drawing machine using the processing apparatus according to claim 1 or 2, comprising the steps of:
1) preparation for planing
Cleaning a machined surface by using a jaw plate;
2) mounting and positioning of jaw plate on machine
Vertically hoisting the jaw plate to the position above a horizontal planer working platform by adopting a hoisting machine, gradually descending at a constant speed until the jaw plate is integrally inserted between two supporting plates of a processing device supporting frame, and integrally placing a jaw of the jaw plate, namely the region where the dovetail groove is located, into flat tongs on the horizontal planer working platform for pre-tightening;
3) correction machining station
Correcting the angle positions of a dovetail groove to be planed and processed on a jaw plate and a horizontal planer working platform by screwing an adjusting screw, and performing alignment correction on a dovetail groove processing surface, wherein the adjusting screw rotates clockwise, the inclined surface of the jaw plate deflects inwards, the adjusting screw rotates anticlockwise, and the inclined surface of the jaw plate deflects outwards; when the extension length of a screw rod of the contact surface of the adjusting screw and the jaw plate is 3.1-3.5 mm, the contact surface, namely the back surface of the 32-jaw plate and the two support plates of the processing device support frame form an obtuse angle of 155 degrees; when the extension length of the screw rod of the screw is 1.0-1.5mm, the contact surface of the jaw plate and the two support plates of the processing device support frame form an obtuse angle of 132-140 degrees; the two angles are the optimal stations for planing the left dovetail groove and the right dovetail groove of the jaw plate; when the processing station of the dovetail groove of the jaw plate meets the planing requirement, a hexagon nut on an adjusting screw is screwed to fix the dovetail groove, and meanwhile, the flat tongs are fixed by applying force;
4) planing
Planing the dovetail groove according to a set cutting speed v and a set feeding amount including a cutting amount f and a back cutting amount a, and performing rough planing and fine planing, wherein the cutting speed v of rough planing is 55-65 times/min, the cutting amount f is 1.0-1.5mm, and the back cutting amount a is 0.5-1.0 mm; meanwhile, a special cutter with angle deflection cutter grinding is adopted when a dovetail part is planed, the cutting speed v of finish planing is 45-55 times/min, the cutting quantity f is 0.5-1.0 mm, and the back cutting quantity a is 0.3-0.5 mm;
5) examination of
Measuring and inspecting the dovetail groove of the jaw plate after finish planing by using a measuring tool and a sample plate, determining whether the dovetail groove meets the technical requirements, if the dovetail groove is qualified, preparing for taking off the machine, if the dovetail groove is not qualified, carrying out finish planing and cutting, and if the dovetail groove is out of tolerance, taking off the machine for surfacing again;
6) machine unloading spare warehouse
The lifting machine is adopted to lift the jaw plate which is planed and meets the technical requirements away from the machine, the flat tongs are loosened, the adjusting screw is withdrawn, the whole jaw plate is lifted away from the horizontal planer working platform, burrs are corrected on the machined part, and the jaw plate is conveyed to a side warehouse of the machine for standby after being packaged.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910414358.1A CN111940806B (en) | 2019-05-17 | 2019-05-17 | Machining device and method for dovetail groove of jaw plate of seamless steel tube cold-drawing machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910414358.1A CN111940806B (en) | 2019-05-17 | 2019-05-17 | Machining device and method for dovetail groove of jaw plate of seamless steel tube cold-drawing machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112589172A (en) * | 2020-12-14 | 2021-04-02 | 贵州航天南海科技有限责任公司 | Slotting machining method for inner cavity positioning surface of frame-shaped part |
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| Publication number | Publication date |
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| CN111940806B (en) | 2022-12-13 |
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