CN108115087B

CN108115087B - Blank rolling feeding, reducing, straightening and derusting method, equipment and product

Info

Publication number: CN108115087B
Application number: CN201711228730.7A
Authority: CN
Inventors: 周俊
Original assignee: Shanghai Pan China Fastening System Co ltd
Current assignee: Shanghai Pan China Fastening System Co ltd
Priority date: 2016-11-29
Filing date: 2017-11-29
Publication date: 2021-04-09
Anticipated expiration: 2037-11-29
Also published as: CN108115087A; WO2018099403A1

Abstract

The utility model provides a metal blank rolling processing module, equipment and production line thereof, and a method for carrying out rolling feeding, reducing diameter, straightening, rounding or derusting processing by using the metal blank rolling processing module, equipment and production line thereof. The rolling processing module can be used for axially rolling the metal blank to realize rolling feeding, roll finishing or reducing; further, the rolling wheels in the rolling processing module are reasonably arranged and rotationally controlled, so that the metal blank can be straightened, rounded or derusted. The equipment and the method thereof have the characteristics of high integration level, simple and reliable structure, low price and the like, can be matched with various existing upsetting equipment and pipe processing equipment, and are expected to replace the existing traditional feeder, drawing machine, reducing device, straightening and rounding machine or/and derusting machine.

Description

Blank rolling feeding, reducing, straightening and derusting method, equipment and product

Technical Field

The invention relates to a metal blank rolling processing module and a rolling processing method for carrying out rolling feeding, surface rolling finishing, rolling diameter reducing, straightening and rounding, surface derusting and the like on a metal blank by using the equipment, belonging to the technical field of metal material surface mechanical treatment and upsetting, rolling and drawing machinery.

Background

As shown in fig. 1, the conventional feeding device for metal blanks (coil stock, bar stock or pipe stock) of an automatic upsetter adopts an up-and-down symmetrical groove-shaped extrusion type rolling wheel feeding mode or a mechanical arm grabbing feeding mode. This feeding method has the following problems: when the diameter of the metal blank has errors with the diameter of the groove of the feeding wheel or the size and shape of the groove of the manipulator, the blank is extruded and injured, the blank is deformed or fed inaccurately, and even the blank is not fed; for the linear feeding mode of the manipulator, the manipulator and the metal blank can generate a slipping phenomenon between the manipulator and the metal blank contact flash due to the speed difference between the initial grabbing moment of the manipulator and the blank static state, and the feeding precision is further influenced. In addition, in the blank alignment aspect, as shown in fig. 2, in the prior art, alignment is achieved by an additional one or more groups of alignment rolling heads which are perpendicular to each other and are composed of 3 to 5 groove-shaped rolling wheels, and different blank diameters need different alignment groove-shaped rolling wheels to be matched with the alignment rolling heads. In addition, because the surface of the metal blank often has an oxide layer, tiny surface cracks or cracks in the existing steel mill production process and the transportation process, the subsequent upsetting deformation process is a great technical problem, and the existing technical scheme is solved by additional pickling and drawing processes or directly removing the blank. The prior art then deals with the outer diameter dimension control of the blank by the drawing process. Finally, because of the limitations of the existing material handling and feeding processes, metal blanks are often burred.

The feeding precision, surface roughness, outer diameter tolerance or/and straightness and roundness of a metal blank have great influence on the shape, size and appearance of an upset forging product or other subsequent processed products, but at present, no process and equipment which integrates the functions of precision feeding, surface size and roughness control, diameter reduction, straightening, circle correction and rust removal, have simple structure and reliable performance and are matched with an upset forging forming machine and a pipe processing machine for use.

Disclosure of Invention

The invention aims to provide a metal blank rolling processing module and a rolling processing method for feeding, reducing, straightening, rounding or derusting a metal blank by using the equipment.

The invention provides a metal blank rolling processing module which comprises at least one power device and at least one rolling head matched with the power device, wherein the power device provides a rotary driving force for the rolling head, the rolling head comprises at least 2 rolling wheels arranged along the circumference, the axes of the rolling wheels and the axes of the processed metal blanks have deflection angles in the vertical direction, and the rolling wheels are cylindrical rolling wheels with smooth outer surfaces or truncated cone-shaped rolling wheels with smooth outer surfaces. Preferably, the deflection angle is less than 9 degrees, more preferably, the deflection angle is less than 3 degrees.

Further, the rolling head may include a first rolling wheel disc, a second rolling wheel disc, a worm wheel or a gear, and a connecting pin shaft, the power device drives the worm wheel or the gear to rotate so as to drive the rolling head to rotate, the first rolling wheel disc, the second rolling wheel disc, and the worm wheel or the gear are provided with radial grooves, workpiece machining working holes, and pin shaft holes corresponding to each other, the rolling wheel is matched with the radial grooves on the first rolling wheel disc and the second rolling wheel disc through a rolling wheel shaft, and the radial grooves are matched with the mounting surfaces of the rolling wheel in an inclined plane; the first rolling wheel disc and the second rolling wheel disc are fixedly connected with each other at two ends of the worm wheel or the gear through a connecting pin shaft matched with the pin shaft hole, the rolling heads are coaxially formed, rolling wheel shafts of the rolling wheels are respectively provided with inclined planes which are parallel to each other at two ends, and the rolling wheel shafts are arranged on radial grooves of the rolling wheel discs through the inclined planes, so that the deviation angle is formed.

Furthermore, the rolling head also comprises a first adjusting disc, a second adjusting disc and an adjusting disc pin shaft, the first adjusting disk and the second adjusting disk are provided with a positioning installation blind hole, an arc-shaped groove, a workpiece processing working hole and a pin shaft hole which are mutually corresponding, the first adjusting disc and the second adjusting disc are respectively coaxially and concentrically arranged at the outer sides of the first rolling wheel disc and the second rolling wheel disc through the positioning and mounting blind holes and are mutually connected by an adjusting disc pin shaft, the two ends of the rolling wheel shaft of the rolling wheel are also provided with extending parts on the outer side of the inclined plane, the extending parts of the rolling wheel shaft of the rolling wheel are arranged in the arc-shaped groove of the adjusting disc, the rolling wheel shaft of the rolling wheel can be driven to slide in the arc-shaped groove by rotating the adjusting disc, and then the rolling wheel shaft of the rolling wheel is driven to move radially in the radial groove of the rolling wheel disc, so that the radial position or the diameter of the inscribed circle of the rolling wheel is changed.

Preferably, a relative rotation position angle detection device is arranged between the rolling wheel disc and the adjusting disc so as to realize accurate control of rolling.

In a preferred metal blank rolling module according to the invention, the number of rolling heads is greater than 2, the individual rolling heads being arranged concentrically one behind the other. Preferably, in order to allow the metal blank to be stretched between two metal blank rolling processing modules, the rolling wheels in two adjacent rolling heads have unequal deflection angles.

The invention also provides a method for straightening the metal blank by using the metal blank rolling processing module with at least 2 rolling heads, which comprises the steps of placing the metal blank between rolling wheels of the rolling heads at the front end of the processing procedure and clamping the metal blank, and setting the diameters of minimum inscribed circles of the rolling wheels in all the rolling heads to be equal; starting the power device, and driving the rolling head to rotate by the power device; the rotating speed of the rolling head which is firstly contacted with the metal blank in the two adjacent rolling heads is controlled by the power device to be less than that of the rolling head which is secondly contacted with the metal blank, so that the metal blank is subjected to axial tension between the two adjacent rolling heads, and the alignment is realized.

The method for removing rust of the metal blank by using the metal blank rolling processing module with at least 2 rolling heads comprises the steps of placing the metal blank between rolling wheels of the rolling heads at the front end of a processing procedure and clamping the metal blank, setting the diameters of minimum inscribed circles of the rolling wheels in the rolling heads to be equal, and setting deflection angles of the rolling wheels in two adjacent rolling heads to be opposite; starting the power device, and driving the rolling head to rotate by the power device; and the rotating directions of two adjacent rolling heads are opposite through the control of the power device, so that the rust removal is realized. More preferably, a metal brush is arranged between two adjacent rolling heads, and the metal brush is used for assisting in derusting.

Preferably, in order to adapt to the rolling processing of the metal pipe, the rolling wheels in two adjacent rolling heads are different in number in odd-even mode. The method for rounding the metal pipe by using the metal blank rolling processing module comprises the steps of placing the metal pipe between rolling wheels of a rolling head at the front end of a processing procedure, clamping the metal pipe, starting a power device, and driving the rolling head to rotate by the power device; the diameters of the minimum inscribed circles of the rolling wheels in the rolling heads are set to be equal, and due to the fact that the rolling wheels of two adjacent rolling heads are different in number, rolling spiral lines formed on the metal pipe by the two adjacent rolling heads in the rolling process are different, and therefore circle correction is achieved.

In a preferred metal blank rolling processing module of the present invention, the rolling wheel in the rolling head is a truncated cone-shaped rolling wheel with a smooth outer surface, and the truncated cone of the truncated cone-shaped rolling wheel is 1 ° to 3 °.

In a preferred metal blank rolling processing module of the invention, the rolling wheel in the rolling head comprises an introduction part and a rolling part, the introduction part is positioned at the front end of the rolling part, the introduction part is a circular table surface with a smooth outer surface or a circular table surface with threads on the outer surface, and the circular table taper of the introduction part is 1-29 degrees; the rolling part is a cylindrical surface with a smooth outer surface or a circular table top with a smooth outer surface. When the leading-in part is a round table with threads on the outer surface, the rolling feeding speed of the metal blank can be more accurately controlled, so that the precision of a rolled product is improved.

The invention also provides a metal blank rolling processing production line which comprises any one of the metal blank rolling processing modules. Preferably, the metal blank rolling processing device further comprises a drawing die and/or a metal brush and/or a heating unit, wherein the drawing die and/or the metal brush and/or the heating unit are arranged at the front end or upstream of the metal blank rolling processing module.

The invention further provides a method for feeding or polishing a metal blank by rolling by using any one of the metal blank rolling processing modules, which comprises the steps of placing the metal blank between rolling wheels of the rolling head and clamping the metal blank, starting the power device, driving the rolling head to rotate by the power device, and further driving the metal blank to move along the axial direction of the rolling head, thereby realizing feeding or polishing.

The invention further provides a method for reducing the diameter of a metal blank by using any one of the metal blank rolling processing modules, wherein the metal blank rolling processing module comprises at least one rolling head with a truncated cone-shaped rolling wheel, the difference value between the diameter of the upper bottom and the diameter of the lower bottom of the truncated cone-shaped rolling wheel is the amount needing to be reduced in diameter, and the metal blank is placed between the rolling wheels of the rolling head at the front end of the processing procedure and clamped; starting the power device, and driving the rolling head to rotate by the power device; thereby driving the metal blank to move along the axial direction of the rolling head, thereby realizing reducing.

The existing numerical control metal blank feeding device is limited by a feeding rolling wheel structure and a complex movement mode of a rolling wheel, the feeding precision is limited, and meanwhile, the functions of further improving the outer diameter size of the surface of a metal blank and improving the roughness and the like are not achieved through roll finishing extrusion. Once cracks appear on the surface of the metal blank before feeding and cutting, the cracks cannot be immediately eliminated and improved, the blank after cutting is automatically transferred to a subsequent upsetting process by an upsetting machine, and the quality of an upsetting product is unqualified.

According to a large number of tests, analyses and researches, when the metal blank rolling equipment disclosed by the invention is used for rolling a metal blank, the outer diameter size of the blank can be effectively corrected, the surface smoothness of the blank can be improved, surface cracks and cracks of the blank can be eliminated, and the surface hardness can be properly improved by reasonably setting the shape and length of the rolling wheels, the difference value between the diameter of the upper bottom and the diameter of the lower bottom of the rolling wheels, the radial distance of the rolling wheels and the number of the rolling wheels. The invention further discloses that the axial feeding speed, direction and rotary direction of the metal blank are controlled in a numerical control mode by adjusting the deviation angle and the axial rotary direction of the rolling wheel and controlling the rotating speed and direction of the rolling head in a combined mode, so that the precision control of the feeding precision, direction and rotary direction is achieved. The radial position of the rolling wheels arranged along the circumferential direction is controlled, so that the radial rolling force is controlled to change the outer diameter size and the roughness of the metal blank, and the surface defects of the blank are eliminated. The metal blank rolling equipment and the rolling processing method thereof which can integrate precise feeding, burnishing extrusion control of the outer diameter size and the surface roughness of the blank, rolling diameter reduction, blank alignment and rounding and rust removal into a whole are creatively realized by reasonably matching the number of the front and the rear groups of rolling wheels (same, different or different odd-even methods and the like), and by utilizing the basic principle that the axial feeding speed difference of the two adjacent groups of rolling heads and two points are in a line and the numerical control twisting of the blank in the axial feeding process. And the structure is simple, the performance is reliable and the cost is low.

The invention has the beneficial effects that: simple, reliable and precise feeding and returning of the metal blank are realized, and a feeding rolling wheel does not need to be replaced within a quite large blank size range; the roll finishing is realized while numerical control feeding is carried out, the outer diameter size of the blank is corrected, the surface defects of the blank (such as longitudinal cracks on the surface of a material) are overcome, and the roughness of the blank is improved; the diameter reducing process of the metal blank can be realized while the metal blank is fed and rolled and polished; the straightness and the roundness of the metal blank can be improved in the processes of feeding, roll finishing and reducing the diameter of the metal blank; the derusting process can be realized in the processes of feeding, tumbling, reducing, straightening and rounding of metal blanks.

Further, the surface hardness of the blank is improved by 10-300% through rolling and polishing, and burrs are greatly reduced in the subsequent blanking process.

Compared with the prior art and equipment, the method, the rolling head, the processing module and the equipment have the characteristics of high integration level, simple and reliable structure, low price and the like; meanwhile, the processed metal blank has better quality, can be matched with various existing upsetting devices and pipe processing devices, is expected to replace the existing traditional feeder, drawing machine, reducing device, straightening and rounding machine or/and derusting machine, and has wide market.

The foregoing objects, aspects and advantages of the present invention will be described in detail with reference to the accompanying drawings.

Drawings

Fig. 1 shows a conventional metal blank feeding apparatus.

Fig. 1a is a schematic view of a conventional twin-roll pinch roller feeding device.

Figure 1b shows a side view of figure 1 a.

Fig. 1c is a schematic view of a two-set two-roll pinch roller feeding device in the prior art.

Fig. 1d shows a conventional manipulator grabbing and feeding device.

Fig. 2 is a schematic view of a conventional metal blank straightening device.

Fig. 2a is a schematic view of a conventional horizontal straightening device with five rollers.

Figure 2b shows a side view of figure 2 a.

Fig. 2c is a schematic view of a conventional coil drawing and diameter reducing device.

Fig. 2d is a schematic diagram of a conventional steel pipe straightening device.

Fig. 3 shows a schematic view of an embodiment of a rolling head according to the invention, wherein the number of rolling wheels is 5.

Fig. 4 shows a schematic view of an embodiment of another rolling head according to the invention, in which the number of rolling wheels is 4.

Fig. 5 shows a schematic view of a structure for transmitting power to a rolling head through a worm gear according to the present invention.

Fig. 5a shows a schematic structural diagram of a rolling head with worm gears.

Figure 5b shows a front view of the structure of the rolling disc of figure 5 a.

Figure 5c shows a side view of the structure of figure 5 b.

Figure 5d shows a front view of the worm gear of figure 5 a.

Figure 6 is a schematic view of the construction of the stitching wheel spindle in the stitching head of figure 5 a.

Figure 6a shows a front view of a roller axle construction.

Figure 6b shows a top view of figure 6 a.

Figure 6c shows a side view of figure 6 a.

The roller shafts and cylindrical rollers shown in fig. 6d are provided with a deflection angle δ perpendicular to the axis of the metal blank.

Fig. 6e is a top view of fig. 6 d.

Fig. 6f is a side view of fig. 6 d.

Fig. 7 is a schematic view showing the structure of a rolling head for transferring rotary power through a worm gear according to the present invention.

Figure 8 is a schematic view of an embodiment of the axial rolling head according to the invention further comprising an adjusting disk on the basis of figure 7.

Figure 9 shows a schematic view of a rolling disc configuration with six rolling wheels in the rolling head of figure 8.

Figure 9a shows a front view of a rolling disc.

Figure 9b shows a side view of figure 9 a.

Fig. 10 shows a schematic view of the structure of the adjustment disk in the roller head of fig. 8.

Fig. 10a shows a front view of the adjustment disc.

Figure 10b shows a side view of figure 10 a.

Figure 11 shows a schematic view of the construction and mounting of the stitching wheel spindle in the stitching head of figure 8.

Figure 11a shows a front view of a roller axle construction.

Figure 11b shows a top view of figure 11 a.

Figure 11c shows a side view of figure 11 b.

Figure 11d shows schematically the rolling wheel spindle and the roller cone in a vertical direction to the axis of the metal blank by a deflection angle delta.

Fig. 11e is a top view of fig. 11 d.

Fig. 11f is a side view of fig. 11 d.

Fig. 12 is a schematic diagram of the rolling wheel structure with lead-in angle, rolling wheel axle, rolling wheel and rolling wheel axle seat (sliding block) of the present invention.

Figure 12a is a schematic view of the rolling wheel construction of the present invention and its cooperation with needle bearings.

Figure 12b shows a schematic view of the inventive roller wheel, needle bearing and roller axle combination.

Figure 12c shows a cross-sectional view of a roller block (sliding block) mated to a roller axle.

Figure 13 is a schematic diagram of an embodiment of a rolling device with a numerical control rolling feeding function according to the invention.

Fig. 14 is a schematic diagram of an embodiment of the rolling equipment with the functions of numerical control rolling feeding, diameter reducing, straightening, rounding and rust removing according to the invention.

Fig. 15 is a schematic diagram of an embodiment of the rolling equipment with functions of numerically controlled rolling feeding, diameter reduction, straightening and rounding of the coiled material according to the present invention.

FIG. 16 is a schematic view of an embodiment of a rolling line with functions of straightening, reducing diameter, straightening, rounding and derusting metal steel pipes according to the present invention.

FIG. 17 is a schematic view of another embodiment of a rolling line with functions of straightening, reducing diameter, straightening, rounding and derusting metal steel tubes according to the present invention.

List of reference numerals

1 machine base and machine base frame;

2 power device, 21 speed changing device, 22 power motor, 23 other mechanical transmission mechanism and 24 manipulator device;

3 workpiece clamping device, 31

workpiece clamping device

1, 32 workpiece clamping device 2;

40, a metal blank;

631 worm, 636 worm gear, roller head frame (mount) 68;

7 rolling heads, 7A, 7B, 7C and 7D first, second, third and fourth rolling heads, 70 forming rolling wheel discs, 70A first rolling wheel discs, 70B second rolling wheel discs, 701 pin shaft holes, 702 pin shafts, 703 inclined planes, 704 working holes, 71 rolling wheel radial grooves, 76 adjusting discs, 76A first adjusting discs, 76B second adjusting discs, 761 pin shaft holes 762, arc-shaped grooves, 763 pin shafts, 764 working holes and 766 installation blind holes;

80 rolling wheels in the prior feeding technology or prior drawing dies or prior metal brush rust removal devices, 81 rolling heads of the invention, 83 rolling wheel shafts of the invention, 831 needle bearings matched with the rolling wheels of the invention, 832a one end face of the rolling wheel shaft of the invention, 832b the other end face of the rolling wheel shaft of the invention, 833 shaft end face extension parts of the rolling wheels of the invention, 86 rolling wheel seats of the invention, 891 axial gaps and 892 radial gaps;

delta axial deflection angle of the rolling wheel shaft of the invention, X axial lead of the rolling wheel of the invention and X' inclined plane central line on the rolling wheel shaft of the invention;

10a sliding seat;

11, (two) axial guide posts or plane guide rails are arranged on the machine base;

18 rolling wheel inscribed circle; 19 upsetter.

Detailed Description

The present invention will be described in detail with reference to preferred embodiments, and it should be noted that, in the following description, although the terms used are selected from publicly known and used terms, some terms are selected by the applicant at his discretion, and the detailed meanings thereof should be understood in accordance with the spirit of the present invention to be disclosed. The expressions "upper", "lower", "left", "right", and the like used herein with respect to the direction are merely meant to be illustrative and do not imply any limitation on the direction of each device and component in use.

The term "smooth outer surface" means that the outer surface does not have a particular pattern, but in particular embodiments the outer surface may be smooth with some surface roughness.

The term "front end" or "upstream" refers to the portion of the metal blank that is first contacted during a machining or manufacturing process.

The term "different even and odd" refers to any two rolling heads that are connected back and forth in the processing sequence, and when the number of rolling wheels included in one rolling head is odd, the number of rolling wheels included in the other rolling head is even.

The term "rolling wheel of circular truncated cone shape" refers to a rolling wheel of circular truncated cone shape, the diameter of the upper bottom circle (also called as "upper bottom diameter") of which is smaller than the diameter of the lower bottom circle (also called as "lower bottom diameter"). Wherein the lower bottom circle and the upper bottom circle of the roller wheel in the shape of a circular truncated cone are selected from known and commonly used terms. Preferably, the circular truncated cone shaped rolling wheel includes a lead-in portion and a rolling portion, in which case the lower base circle, the upper base diameter and the lower base diameter refer to parameters of the rolling portion.

The term "rolling wheel inscribed circle" is understood to mean the circle of smallest outer diameter tangent to each of the rolling wheels in the rolling head or the circle formed by the rolling wheels in contact with the outer circle of the blank. In the rolling process, the diameter of the inscribed circle of the rolling wheel can be adjusted to be less than or equal to the outer diameter of the metal blank and coaxial with the metal blank.

The term "inclined plane" refers to a plane which is taken by the axial line of the rolling wheel and forms an axial feeding included angle with the horizontal plane.

The term "handedness" of the rolling wheel refers to the direction of the left or right hand helix of the rolling wheel. When the deviation angle delta is set to be right-handed, the deviation angle-delta is left-handed, and the left-handed and right-handed angles can be different.

In the present invention, the two lines (assumed as the line a and the line b) have a deviation angle in the "vertical direction", and it can be understood that, in the XYZ three-dimensional coordinate system, the plane parallel to both the vertical plane of the line a and the vertical plane of the line b is an XY plane, and the included angle between the two lines (the line a 'and the line b') formed by projecting the line a and the line b along the Z axis in the XY plane is the deviation angle of the line a and the line b in the "vertical direction". For example: the axis of the rolling wheel and the axis of the processed blank have a deviation angle of not more than 9 degrees in the vertical direction, and it can be understood that in an XYZ three-dimensional coordinate system, a plane parallel to both a vertical plane of the axis of the rolling wheel and a vertical plane of the axis of the processed blank is set as an XY plane, and an included angle between two lines formed by the axis of the rolling wheel and the axis of the processed blank projected in the XY plane along the Z axis is not more than 9 degrees.

The metal of the invention refers to various metals which can be processed by cold forming in industry, such as steel, copper or aluminum.

The blank of the invention refers to various metal bar materials, metal coil materials and metal pipe materials with circular sections, the blank can be solid or hollow, and the hollow metal blank is also called as a metal pipe in the invention.

The rolling feeding of the invention refers to a radial uniform and reasonable rolling process of a metal blank by using a rolling wheel, and the process comprises a rolling polishing process, so that the term "rolling feeding" process in the invention can also be understood as a "rolling polishing feeding" process.

The rolling head is a device for performing rolling processing on a metal blank, and the main body part comprises a plurality of rolling wheels for rolling or/and rolling wheel seats for supporting or fixing the rolling wheels. The rolling wheels are matched with the rolling wheel seats through rolling wheel shafts and are distributed in an equal distribution mode around the machining axis direction of the blank. According to the requirement, the rolling head can be also provided with other mechanical, hydraulic, pneumatic or electric devices, so that the rolling wheel seat and the rolling wheel can move in the radial direction of the blank to be processed to adapt to the rolling processing of the blanks with different materials or properties with reasonable rolling pressure and rolling time. Other devices may also be provided as necessary.

The rolling processing module of the invention refers to a rolling head or a plurality of rolling heads or a combination of the rolling heads and other processing devices (or dies), each rolling head can be completely independent or arranged in an integral structure, and other processing devices include, but are not limited to, drawing dies, metal brushes or heating units, etc. For example: in one embodiment of the invention, a wire drawing die is coaxially arranged between the first rolling head and the second rolling head, and the blank is precisely drawn through the wire drawing die under the action of the axial feeding force of the first rolling head and the second rolling head. Because of no self-power drive, the axial feeding speed of the blank in other processing devices is zero.

In the invention, the first rolling head is the rolling head which firstly contacts the blank in all the rolling heads of the invention, and the second rolling head and the third rolling head are the same in sequence. For convenience of description in some cases, the rolling process performed by the "first rolling head" is also referred to as a "preforming rolling" process, or the "first rolling head" is referred to as a "preforming rolling head", or the "first rolling wheel" is referred to as a "preforming rolling wheel", and preforming may be understood as some portion or all of the rolling feed or the rolling or reducing. The rolling process by the "second rolling head" is referred to as a "post-forming rolling" process, or the "second rolling head" is referred to as a "post-forming rolling head" and the "second rolling wheel" is referred to as a "post-forming rolling wheel". However, this description does not limit the feeding or tumbling or reducing functions of the "first rolling head" described in the present invention, even if the other processing devices are added, to the straightening and rounding or/and descaling functions, nor does it mean that all the technical effects described in the present invention can be achieved or achieved by means of the "second rolling head".

The first or second or further rolling head arrangements of the invention may be identical or similar.

The rolling head of the invention rotates without the hollow blank rotating or the rolling head of the invention does not rotate without the hollow blank rotating is opposite, also can be converted or the two rotate mutually.

The following detailed description is made with reference to the accompanying drawings:

1. description of the Prior Art

FIG. 1 is a schematic view showing a metal blank feeding apparatus in a conventional cold or warm or hot header. Fig. 1a is a schematic view of a conventional vertically symmetrical grooved roller feeding device, fig. 1b is a side view of fig. 1a, fig. 1c is a schematic view of a conventional two-group vertically symmetrical grooved roller feeding device, and fig. 1d is a conventional manipulator grabbing and feeding device. The diameter size and the precision of the inner arc of the roller wheel or the mechanical arm groove have great influence on the feeding quality. When the diameter of the wire material has errors with the diameters of the grooves of the upper feeding wheel and the lower feeding wheel or the inner diameter of the mechanical arm, the blank is injured, the extrusion deformation or the inaccurate feeding of the blank can be caused, and even the blank cannot be fed. In addition, because the manipulator initially picks up the time and has speed difference with static blank, the manipulator can produce the phenomenon of skidding with the blank contact in the twinkling of an eye, and then influences the pay-off precision.

Fig. 2 is a schematic view of a conventional metal blank straightening device. Fig. 2a is a schematic view of a horizontal blank straightening device with a set of five rolling wheels in a conventional cold header, warm header or hot header. A plurality of groups of roller wheel straightening groups which are vertical to each other are arranged in the existing upsetting machine so as to improve the straightening precision. Figure 2b shows a side view of figure 2a, as with the feed roller configuration described, different blank diameters require different sizes of aligned grooved rollers to match and present the same problems as the feed mechanism. In addition, oxidation and collision are generated during production and transportation of the existing steel mills, so that an oxide layer and micro cracks or cracks on the surface of the metal blank are generated, and the prior art adopts the methods of drawing, reducing and straightening, pickling and the like of the coil stock shown in the figure 2 c.

Fig. 2d is a schematic diagram of a device for straightening and rounding a steel pipe in the prior art, and the manner and principle of drawing and reducing the diameter of the steel pipe are the same as those in fig. 2c, and are not repeated. Similarly, due to the structure and the working mode of the roller wheel, the problems of low straightening precision and the like can occur, and the problems are generally solved by adopting a plurality of groups of horizontal and vertical straightening modes, but the equipment is huge and the process is complex.

2. The invention relates to a metal blank rolling processing module and rolling feeding, reducing, straightening, rounding and derusting processes thereof

The main spirit of the metal blank rolling feeding, diameter reducing, straightening, rounding and derusting process is that the metal blank rolling feeding, the metal blank rolling polishing and the diameter reducing are realized by matching one or more rolling heads with smooth rolling wheels on the middle and outer surfaces of the rolling heads for axial feeding rolling and by means of the shape (circular truncated cone shape or cylindrical shape) of the rolling wheels in the rolling heads, the difference (or taper) between the diameter of the bottom circle and the upper and lower bottom circles, the length of the rolling wheels, the deflection angle of the rolling wheel shaft, the radial position of the rolling wheels, the rotating speed of the rolling heads and the matching of the number of the rolling wheels in different rolling heads; and then the functions of straightening, rounding or derusting are realized by matching the axial feeding speed difference of the front and rear adjacent rolling heads with the rolling wheel rotating direction or/and other machining devices.

In one embodiment, the blank is rolled axially by means of rolling heads consisting of five rolling wheels with offset angles distributed in the circumferential direction. When the rolling wheel is a cylindrical rolling wheel, the rolling head only realizes rolling feeding. The radial rolling pressure applied to the blank by the five rolling wheels is changed through the adjustment of the radial positions of the rolling wheels. The value of the rolling force is the technological value, in particular, the feeding is carried out with the minimum radial force under the condition of ensuring that the outer surface of the blank is not extruded or injured or/and slipped according to different materials and feeding speeds. When surface tumbling is performed according to process requirements, the radial force increases, and the size of the inscribed circle of the rolling wheel is smaller than the size of the outer diameter of the blank by a value of the tumbling process, such as 0.01mm or 0.1mm or 1 mm. When the rolling is a circular truncated cone-shaped rolling wheel, the difference value between the diameter of the upper bottom and the diameter of the lower bottom is the value of the diameter reduction or the roll finishing extrusion of the blank. In one embodiment, the original diameter of the blank is 18 mm and the process requires drawing to 17.2 mm. The diameter of the upper bottom of the selected circular truncated cone-shaped rolling wheel is 20 mm, and the diameter of the lower bottom of the selected circular truncated cone-shaped rolling wheel is 19.2 mm. By applying the method, the metal blank is rolled and extruded by the smooth circular truncated cone-shaped rolling wheel while the precise feeding and diameter reducing of the metal blank are realized, so that the outer diameter size and the surface smoothness of the metal blank are improved, surface cracks are eliminated, the surface hardness of the blank is improved, and the method is greatly beneficial to subsequent processes such as cutting, upsetting and the like.

The rolling feeding is precisely controlled by a servo motor, the feeding precision and efficiency are superior to those of the prior art, and the rolling feeding device is simple in structure and good in reliability. The rolling wheel has different degrees of size and finish correction and even diameter reduction on the blank in the rolling feeding process, and is obviously superior to the prior art.

The larger the axial feeding deviation angle of the rolling wheel is, the higher the axial feeding speed of the blank is. Under the condition that the deviation angle is determined, the rotating speed and the number of turns of the rolling head control the speed and the length precision of blank rolling feeding.

When two or more rolling heads (groups) are adopted, the blank is respectively or independently and repeatedly subjected to rolling feeding, rolling polishing and rolling diameter reduction to meet the process requirements, and the principle of the rolling head is the same as the working principle of a single rolling head. The blank is stretched and axially fed between the two rolling heads under the action of the axial traction force of the second rolling head or the adjacent previous rolling head in accordance with the axial feeding speed difference of the second or more rolling heads. The axial distance between the two groups of rolling heads is the axial distance between the tail part of the first rolling wheel and the head part of the second rolling wheel, and is also the length of blank alignment.

In yet another practice, a drawing die of the prior art is fitted between the first and second rolling heads so that the blank can be trimmed or rolled or necked down three times throughout the blank rollfeed process. The time interval and the distance between the three processing devices are accurately set according to the material and the process requirement.

In another implementation, the first rolling head and the second rolling head can be further matched with the prior art, for example, an annular metal brush rust removal device is added, so that the surface mechanical rust removal treatment can be effectively carried out on the blank in the blank rolling feeding process. It is particularly noted that the rolling wheels in the first and second rolling heads preferably have different directions of rotation and different speeds of rotation, and the difference between the direction of rotation and the speed of rotation is a process value, depending on the material of the blank, the diameter and the oxide layer, etc. In the rolling and feeding process, the blank is continuously and numerically controlled and screwed, and the surface oxide layer is continuously peeled off under the action of the annular metal brush, so that the mechanical rust removal effect is achieved. The third rolling head or/and the fourth rolling head or even more rolling heads can be added to effectively perform multi-section numerical control screwing to achieve the effect of rust removal, and other mechanical or chemical devices can be added to increase the effect of rust removal.

By combining the different methods, the rolling feeding method can realize the purposes of independent or combined precision feeding, roll finishing, diameter reduction, straightening and rounding, rust removal and the like.

In addition, it should be noted that the pre-rolling process in the rolling feeding process of the present invention can be realized by one-time pre-rolling, or by multiple rolling, for example: and performing primary, secondary and repeated correction pre-rolling, and then performing subsequent feeding, roll finishing, diameter reduction, alignment, rounding and rust removal rolling.

For feeding, polishing, reducing, aligning, rounding and derusting of hollow blanks, the number of rolling wheels in the front and rear rolling heads is preferably different even and odd, i.e. in an embodiment with two different process steps of pre-forming rolling and subsequent forming rolling, the number of rolling wheels for pre-forming rolling is different from the number of rolling wheels for subsequent forming rolling by odd and even numbers. Under the condition of odd-even number matching, the processing yield of the hollow product can be obviously improved through axial feeding speed control and length design of the rolling wheels.

3. Arrangement of rolling wheels in the process of the invention

The matching of the number of odd and even numbers of first rolling wheels in the first rolling head and second rolling wheels in the second rolling head in fig. 3 and 4 reveals a part of the spirit of the present invention, which is again important for hollow blank feeding, tumbling, reducing straightening and rounding and derusting processing.

In one embodiment, the number of the first rolling wheels is 3, and the number of the second rolling wheels is 4 or 6.

In another embodiment, the number of first stitching wheels is 4 and the number of second stitching wheels is 3 or 5.

In yet another embodiment, the number of first stitching wheels is 6 and the number of second stitching wheels is 5 or 3.

In a further embodiment, the number of first stitching wheels is 9 and the number of second stitching wheels is 4, 6 or 8.

The spinning lines of the hollow blank in the front rolling and the back rolling are not overlapped, the hollow blank with an irregular polygon on the unit section is pre-rolled into a controllable regular polygon, partial residual stress of the hollow blank is released, the stress distribution is more uniform, and the out-of-roundness of the blank is corrected; and then the regular polygon is matched with the number of the subsequent forming rolling wheels, so that the original residual stress of the hollow blank is further released, and the out-of-roundness and the straightness of the hollow blank are improved.

It should be noted that the relationship between the number of the pre-forming rolling wheels, the taper and the length thereof, the number of the subsequent forming rolling wheels and the length precision of the product can be increased, decreased or matched according to the requirements of the outer diameter and the wall thickness of the (hollow) blank, the material, the out-of-roundness of the (hollow) blank, the diameter of the rolling wheels, the form of the rolling wheels and the like.

The roller form is preferably a structure in which the rollers are integral with the roller axle. Therefore, the number of the rolling wheels can be effectively increased, the times of rolling for multiple times can be reduced, and the service life of the rolling wheels can be prolonged.

Fig. 5 shows a schematic drawing of a rolling head according to the invention with only rolling wheel discs 70, in this embodiment 6 rolling wheels 81 are provided, which are distributed equally around the axis of processing of the hollow blank. The rolling head is driven by the power motor through the worm wheel 636 to rotate, so that the rolling wheels 81 rotate around the rolling wheel shaft 83. Fig. 8 shows a schematic drawing of a rolling head according to the invention comprising a radial adjustment disc 76 and a rolling wheel disc 70, comprising 6 rolling wheels 81, which are equally distributed around the machining axis of the hollow blank. The power motor rotates the rolling head driven by the worm gears 631 and 636, so that the rolling wheel 81 rotates around the rolling wheel shaft 83.

4. Structure of rolling head

The first or second rolling head according to the invention can be of identical or similar design. In a specific embodiment, both the first rolling head and the second rolling head can be of a design with rolling wheel discs and adjusting discs or of a design with only rolling wheel discs.

FIGS. 5-12 further illustrate in greater detail an embodiment of a universal rolling head structure of the present invention.

Fig. 5a is a schematic structural view of an embodiment of an axially rolled rolling head according to the present invention. Fig. 5b is a front view of a rolled wheel disk provided with six rolled wheels in the rolling head of fig. 5a, fig. 5c is a side view of the rolled wheel disk, and fig. 5d is a structural front view of the worm wheel of fig. 5 a.

As shown in fig. 5a to 5d, the rolling head includes front and rear rolling wheel discs 70(70A, 70B), a worm wheel 636, a rolling wheel shaft 83 and a rolling wheel 81 thereof which are matched with the radial groove 71 on the rolling wheel disc, and a connecting pin shaft 702 which is matched with a pin shaft hole 701 on the rolling wheel disc; a workpiece machining working hole 704 is formed in the center of the rolling wheel disc, and the radial groove 71 of the rolling wheel disc and the installation surface of the rolling wheel are inclined planes 703; the stitching wheel shaft 83 is mounted to the stitching wheel disc radial slots 71 by its two end beveled

surfaces

832a and 832b that mate with the radial slots 71 on the stitching wheel disc, the radial slots 71 being shaped and dimensioned to allow the stitching wheel shaft 83 to be axially mounted. The two

rolling wheel discs

70A and 70B are mutually connected and fixed at two sides of a worm wheel 636 by the rolling wheel disc connecting pin shaft 702, and form a rolling head coaxially. In addition, a rolling time and length position controller (not shown) is installed at one end of the rolling head for controlling the forming rolling time and the rolling axial length.

Fig. 6 is a three-dimensional view of the structure of a rolling wheel shaft in the rolling head in fig. 5 and a schematic view of the arrangement of a deviation angle delta of the rolling wheel shaft and a blank axis in the vertical direction, wherein the deviation angle delta is equal to the axial feeding deviation angle. Wherein figure 6a is a front view, figure 6b is a top view and figure 6c is a side view of the roll axle. At each end of roller axle 83 are upper and lower angled

flat surfaces

832a and 832b, respectively, which are parallel to each other, the x' axis of the angled flat surfaces forming a deflection angle δ with the axial center line x of the roller axle. The axis of the processed blank is parallel to x ', and x forms an included angle with the plane formed by the axis of the processed blank and x', and the included angle is equal to a deviation angle delta. Figure 6d is a schematic view of the roller shaft and cylindrical roller with a deflection angle delta perpendicular to the axis of the metal blank. Fig. 6e is a top view of fig. 6d and fig. 6f is a side view of fig. 6 d. Figure 6d clearly shows that when the stitching wheel is mounted concentrically in the centre of the stitching wheel axle, the stitching wheel axle centre line forms a deviation angle δ with the

inclined planes

832a, 832 b. Since the rolling wheel shafts are perpendicular to the inclined planes 832a/832b, the mounted rolling wheel shafts axially form an axial feed deflection angle delta with the blank, and the blank can be axially moved when the blank and the rolling wheel are contacted and rotated mutually. The greater the deflection angle δ, the faster the blank moves axially, generally not exceeding 9 degrees, preferably less than 3 degrees. If the delta angle is set to be right-handed, the-delta angle is left-handed, and the left-handed and right-handed angles can be different.

Fig. 7 is a schematic view showing the structure of a rolling head for transferring rotary power through a worm gear according to the present invention. Still further preferably, the rolling head further comprises a worm or gear 636, a speed changing device 21 and a power motor (not shown in the figure), one end of the worm or gear 636 is mechanically matched with the output shaft of the speed changing device 21, the other end of the worm or gear 636 is mechanically matched with the worm or gear 636, and the power motor drives the worm or gear 636 to rotate through the speed changing device 21, and drives the rolling wheel disc 70 to rotate through the worm or gear 636.

Fig. 8 is an embodiment of an axial rolling head according to the present invention, which further includes an adjusting disk on the basis of fig. 7, and fig. 9 to 11 are schematic structural views of the rolling disk and the adjusting disk, and the rolling shaft and the rolling wheel in the rolling head of fig. 8.

Figure 9 is a schematic view of the rolled disk of figure 8. Wherein figure 9a is a front view of the rolled disk and figure 9b is a side view of the rolled disk. The rolled disk of fig. 9 is substantially similar in construction to the rolled disk of fig. 5, except for the shape of the radial slots 71. Figure 9 shows a combination of a cylindrical roller disk radial slot 71 and a rectangular parallelepiped, the cylindrical body being present for mounting a roller axle with a cylindrical end, and figure 5b shows a roller disk radial slot 71 which is approximately rectangular parallelepiped for mounting with a roller axle with an approximately rectangular end. Other structures are the same and are not described in detail.

Fig. 10 is a schematic view of the structure of the adjustment disk of fig. 8. Wherein fig. 10a is a front view of the dial structure and fig. 10b is a side view of the dial structure. The radial adjusting device comprises a front adjusting disc 76A, a rear adjusting disc 76B and a fixed connecting pin shaft 763 matched with a pin shaft hole 761 on the adjusting discs; a workpiece machining working hole 764 matched with the rolled wheel disc and an adjusting disc positioning mounting blind hole 766 matched with the rolled wheel disc are formed in the center of the adjusting disc; the adjusting disc 76 is respectively arranged on the outer side of the rolling wheel disc in a front-back coaxial manner through the adjusting disc positioning blind hole 766, is mutually connected through an adjusting disc pin shaft 763 and forms shaft hole matching with the mounting blind hole 766; rotating the adjusting disc 76, installing the sliding blocks 836 (as shown in fig. 12 c) at the two ends 833 of the rolling wheel shaft, sliding in the arc-shaped slots 762 of the adjusting disc, so that the rolling wheel shaft 83 moves radially in the radial slots 71 of the rolling wheel disc 70, and forming a rolling head with adjustable radial position of the rolling wheel; in addition, a rolling position photoelectric sensing controller (not shown) is arranged at one side of the rolling head for completing the rolling process, and is used for controlling the rolling time and the rolling length. The power motor rotates the rolling head driven by the worm gears 631 and 636, so that the rolling wheel 81 rotates around the rolling wheel shaft 83.

Fig. 11 is a schematic view of the structure of the rolling axle and the arrangement of the deflection angle of the rolling axle according to the present invention, wherein fig. 11a is a front view of the rolling axle, fig. 11b is a top view of the rolling axle, fig. 11c is a side view of the rolling axle, fig. 11d is a schematic view of the rolling axle and the blank axis being arranged at an included angle δ in a vertical direction, fig. 11e is a top view of fig. 11d, and fig. 11f is a side view of fig. 11 d. The roller axle of figure 11 differs from the roller axle of figure 6 in the two ends of the axle. In one embodiment, the two ends of the roller axle in fig. 6 are rectangular, while in fig. 11 the two ends of the roller axle are cylindrical. The shape of the two ends of the rolling wheel shaft is not limited to rectangle or cylinder, and depends on the matching design and installation mode of the rolling wheel shaft and the radial groove of the adjusting disc. The setting principle of the deviation angle of the rolling wheel is completely consistent with that of figure 6, and the description is omitted.

Figure 12 is a schematic view of a roller wheel, needle bearing and roller axle combination according to the present invention. Wherein, fig. 12a is a schematic diagram of the structure of the rolling wheel according to the invention, the rolling wheel is divided into an introduction part and a rolling part, the introduction part is a circular table, preferably a circular table with screw thread on the outer surface, the taper of the circular table is 1-29 degrees, and the general taper can be 13 degrees. The taper of the circular truncated cone of the rolling part or the sizes of the upper and lower bottom diameters and the length of the rolling wheel depend on the numerical values of the reducing and the rolling process, and the value is generally 1 to 3 degrees. Fig. 12b shows a schematic view of the structure of the roller 8 engaged with the needle bearing 831, and the main purpose of the roller engaged with the bearing is to reduce the rotational friction of the roller. The rolling wheels 81 are freely mounted on the rolling wheel shaft 83 through needle bearings 831, and the rolling wheel shaft 83 and the rolling wheels 81 can be matched through balls, centering or other bearings. FIG. 12c is a cross-sectional view of a slider that matches the roller axle, with the two cylindrical ends 833 of roller axle 83 mounted in the holes of (position adjustment) slider 836, as shown in FIG. 12c, forming a shaft-hole fit; the sliding block 836 is installed in the arc slot 762 (as shown in fig. 10 a) of the adjusting disk, and forms a cylinder and a circular arc. In addition, a rolling position controller (not shown) is installed at the end of the rolling head for controlling the rolling time and the rolling length. The stitching wheel disk is floatingly secured to the machine frame (not shown) by a stitching head frame 68 (shown in figures 13 and 14).

The adjusting disc is rotationally adjusted relative to the rolling wheel disc, a cam device (not shown in the figure) is arranged on the adjusting disc, and the radial distance adjustment of the rolling wheels and the radial opening of the rolling heads are controlled through cam curves. If necessary, a detecting device (not shown) which can rotate relatively can be arranged between the rolling wheel disc and the adjusting disc for the purpose of numerical control.

In a specific embodiment, the rolling head of the invention can be designed with a rolling wheel disc and an adjusting disc or only with a rolling wheel disc.

Although the present invention has been described with reference to preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the invention.

5. Feeding, roll finishing, reducing, straightening, rounding and derusting rolling processing module or/and corresponding rolling equipment

Fig. 13 to 14 are structural distribution diagrams of two embodiments of the rolling processing module of the present invention, in which a rolling head is driven by a power servo motor through mechanical transmission of a reduction box, a worm gear, a worm, and the like to rotate.

The preforming rolling head and the subsequent forming rolling head of the invention may be separate or separated, or may be combined into one body. When the two components are combined into a whole, the working procedures can be effectively saved, the product to be processed is formed by sequential rolling, the whole design is more compact, and the transportation and the installation are convenient.

Figure 13 is a schematic diagram of an embodiment of a single roll finishing module according to the present invention. In the figure, a rolling head is arranged above the rolling head by a (servo) power motor 22, and the rotary power is respectively transmitted to rolling discs 7A/7B through a speed changing device 21, a worm 631 and a worm wheel 636 to drive the preforming rolling head arranged on a rolling head seat to rotate so as to finish rolling feeding, outer diameter correction, diameter reduction and surface rolling. According to the process requirement, a machining device, such as a wire-drawing die or an annular metal brush rust removal device, can be added to achieve the process effects of blank straightening, diameter reduction and rust removal.

Fig. 14 is a schematic structural diagram of a roller processing module in which the preforming roller 7A and the subsequent forming roller 7B are separated. The right side is a preforming rolling head 7A with 5 rolling wheels 81, the left side is a subsequent forming rolling head 7B with 4 rolling wheels 81, the rolling

heads

7A and 7B are of a rolling head structure similar to that of fig. 8, specifically, the radial grooves (71) in each rolling head and the mounting surfaces of the rolling wheels (81) can be inclined planes (703) or conventional planes, and the specific structural design is not limited to the rolling head structure directly disclosed by the invention. The rolling heads 7A and 7B are respectively controlled by respective servo motors. Under the action of the roller wheels in the roller head 7A, the outer diameter of the blank 40 is finely rolled to the outer diameter tolerance required by the process. The surface is extruded and roll-finished, thereby achieving the three purposes of feeding, outer diameter correction and roll-finishing the surface. When the motor speed of the rolling head 7B is increased, the axial speed of the blank 40 in the rolling head is higher than that of the blank 40 in the rolling head 7A, so that axial drawing force is generated between the rolling

heads

7A and 7B, and the blank is naturally drawn and straightened according to the principle that two points are in a line. If necessary, a wire drawing die head can be added between 7A and 7B to further improve the process and the precision.

In addition, a relative rotation position angle detection device (not shown) is arranged between the rolling wheel disc and the adjusting disc of the pre-forming rolling head 7A and the subsequent forming rolling head 7B, and is determined according to the diameter change of the blank, the wall thickness of the hollow blank, the diameter reduction size requirement, the straightness requirement or/and other practical requirements of materials and processed products. The process is similar to that described above and will not be described in detail.

Other mechanical processing devices such as a metal brush rust removal device can be added between the two rolling heads according to requirements to complete the processes of rolling finishing, diameter reduction, straightening, rounding, rust removal and the like.

The processing time and speed are controlled by the control system and the spirit of the present invention. It should be noted that it is preferable to use a rolling head with adjustable radial position, and the radial position of the rolling wheel is adjusted according to the outer diameter of the steel pipe blank, its out-of-roundness, wall thickness and material or/and the requirement of subsequent rolling; of course, when processing hollow blanks, the number of rolling wheels in the front and back procedures must be matched in an odd-even mode and the total number of rolling wheels must be matched in an even-odd mode.

6. Numerical control feeding, reducing, straightening, rounding and derusting rolling production line

FIG. 15 is a schematic view of an embodiment of a device for numerically controlled rolling feeding, diameter reducing, straightening, rounding and derusting of coiled materials according to the present invention.

The process of the feeding device on the existing cold heading machine is not described in detail herein. According to the method of the invention, when the coil is introduced into the rolling head 7A, it is fed stepwise under servo-motor control to the rolling head 7B. Under the action of the roller wheels in the roller head 7A, the outer diameter of the coil 40 is finely rolled to the outer diameter tolerance required by the process. The surface is extruded, and three purposes of feeding, outer diameter correction and surface roll finishing are achieved. The rotating speed of the rolling head 7B is higher than that of the rolling head 7A through motor control, the axial speed of the blank 40 in the rolling head 7B is higher than that of the blank 40 in the rolling head 7A, so that a drawing force exists axially between the rolling

heads

7A and 7B, and the blank is naturally straightened and straightened according to the principle that two points are in a line. If necessary, a wire drawing die head or/and a ring-shaped metal steel brush can be added between 7A and 7B to further improve the diameter reduction or straightening process effect. When the deviation angle of the rolling wheel in the first rolling head is set to be right-handed and the deviation angle of the rolling wheel in the second rolling head is set to be left-handed, numerical control screwing is realized, the left-handed and right-handed directions can be different or the same, and the rust removal effect of the blank is improved by the numerical control screwing.

FIG. 16 is a schematic view of an embodiment of a diameter reducing, straightening and rounding and rust removing rolling production line for a metal steel pipe according to the present invention.

The working principle of the device 16 is similar to that of fig. 15, and the description is omitted. The difference is that the blank is a hollow steel pipe, so the number of the rolling wheels in the 7A and the 7B is odd-even, that is, when the number of the rolling wheels in the preforming rolling process is odd, the number of the rolling wheels in the rolling feeding process must be even; when the number of the rolling wheels in the preforming rolling process is even, the number of the rolling wheels in the adjacent rolling feeding process must be odd. Under the condition of odd-even number matching, the yield of hollow products can be obviously improved by effectively controlling the axial feeding speed and the length of the rolling wheel.

In addition, diameter reduction, straightening, rounding and rust removal of the steel pipes generally have no requirement on feeding precision, so that the control of the mutual rotating speeds of the 7A and the 7B or the difference between the deflection angle and the turning angle of the rolling wheels in the rolling heads, the axial distance between the rolling heads, the number, the length and the outer diameter size of the rolling wheels are important for the process effect.

Likewise, additional draw and size reduction dies 80 or rust removal devices or other processing devices may be added to further enhance the desired process results.

FIG. 17 is a schematic view of another embodiment of a diameter reducing, straightening and rounding and rust removing rolling line for a metal steel pipe according to the present invention. The arrangement of the rolling heads/groups is different from that of fig. 16, and two additional rolling heads are added to increase the process effect, and the principle is the same as that of fig. 16, and is not repeated.

7. Three embodiments of the invention for processing metal blanks

First, the present invention will be further explained in comparison with the prior art (as shown in fig. 1 and 2) with reference to fig. 5, 8, 14 and 15.

The 42CrMn low-carbon alloy coil stock with the wire diameter of 16 mm +0.70/-0.10 is a common material for automobile fasteners and is used for producing the automobile engine fasteners of M14 by cold heading. The conventional prior art is to precisely draw the coil stock through a drawing die 80 by a drawing machine (shown in fig. 2 c) to 16 mm +0.10/-0.10 required by the process, and then enter a cold header for blanking and upsetting. Under the power traction of a feeding mechanism (shown in figure 1 a) of a cold header, the process coil stock 40 passes through a 5-roller horizontal alignment group (shown in figure 2 a) and a 5-roller vertical alignment group (not shown in the figure) for alignment, and then is cut and upset. Obviously, the processing has the problems of feed slip, and more importantly, the problem that longitudinal cracks generated on the surface of a coil during drawing in a steel mill or other material surface defects before entering cold heading cutting cannot be treated. In addition, the prior art needs two different processing technologies and equipment to finish the process, the feeding technology, the straightening technology and the material drawing technology are separately carried out, and the technologies have no direct control method and mutual coordination.

As shown in fig. 15, according to the method of the present invention, one end of a metal blank 40 is introduced into a rolling head 7A of the present invention, and under the power 22, the rolling head equipped with 5 rolling wheels is rotated, and the blank 40 is axially fed to a cold heading machine feeding mechanism 7B (a rolling head having 6 rolling wheels). Firstly, precisely rolling the plate material 40 from 16 mm +0.70/-0.10 to 16 mm +0.10/-0.10 under the action of a circular truncated cone-shaped smooth rolling wheel in a rolling head 7A, and then entering the circular truncated cone-shaped smooth rolling wheel of a rolling head 7B for secondary precise rolling to enable the diameter range of the metal blank 40 to be precisely rolled to 16 mm + 0.05/-0.05. Secondly, in the precise rolling shaping process, the rolling wheel axial offset angles of the rolling

heads

7A and 7B are set to be the same, the servo motor speed on each rolling head is controlled through a numerical control system, the rotating speed of the 7A is made to be lower than that of the rolling head 7B, and the straightness of 1m of the coiled material between the rolling heads can be 0.05 mm; and thirdly, due to the cold work hardening effect of cold rolling, the surface hardness of the periphery of the plate material 40 is improved by about 10-15%, and due to the fact that the plate material is rolled, straightened, rounded and derusted again before being cut, micro scratches, cracks and even a surface oxide layer on the surface of the plate material are overcome by extrusion. Because the surface hardness is improved by rolling again, the flatness of the cut surface is greatly improved compared with that of the prior straightening process when the blank is subjected to cold heading, and the burr phenomenon is completely avoided, thereby being beneficial to the forming precision of a cold heading formed part and the service life of a die of cold heading equipment. Then, because the rolling wheel tightly presses the blank 40, no slip phenomenon exists between the rolling wheel and the blank, the numerical control system precisely controls the rotating speed of the rolling head 7B/7A through a servo motor under the action of an angle encoder (not shown in the figure), thereby precisely controlling the feeding length of the coiled material 40. Finally, the same pair of rolling wheels is used, the radial position of the rolling wheels or the size of the inscribed circle of the rolling wheels is adjusted through a radial adjusting device (shown in figure 8), the diameter of the coiled material can be processed to be 5mm at the minimum and 30 mm at the maximum, and the method is obviously superior to any existing feeding, drawing, straightening and rounding equipment or/and derusting equipment.

It should be noted that, when the process is required, the numerical control system can realize the reverse rotation of the rolling head, so that the metal blank 40 can rapidly exit from the cutting device. This function, especially for the heating blank device, can effectively protect the coiled material heating unit can not make the coiled material overheated or heating device damage because of the waste heat in the heating device when equipment shut down.

Next, referring to fig. 3, 4, 8, 14 and 16, another method of reducing diameter, straightening and rounding or/and removing rust by rolling and feeding a hollow metal blank according to the present invention will be further described in comparison with the prior art of reducing diameter in drawing a steel tube (as shown in fig. 2 d).

In fig. 16, the first rolling head 7A and the second rolling head 7B are each arranged on the same machine frame 1. The rolling heads 7A and 7B are the same as the rolling head modules, the number of the rolling wheels in the rolling heads 7A and 7B is respectively 5 and 6 or 8 or 10, the rolling wheels are smooth truncated cone-shaped rolling wheels, the axial line of the rolling wheel of the rolling head 7A and the axial line of the steel pipe blank have a deviation angle of 1-10 ', and the deviation angle of the rolling wheel in the rolling head 7B is 1-30'. One end of a metal blank 40 is arranged on the clamping device 31, one end of the metal blank is guided into the rotary rolling head 7A to carry out primary rolling feeding diameter reduction finishing, the rolling wheel in the rolling head 7A rotates to enable the steel pipe blank to move axially on the plane guide rail 11 by relying on the sliding seat 10 on the clamping device, and the steel pipe blank is gradually guided into the rotary rolling head 7B to carry out secondary circle correction rolling. Because the deflection angle of the rolling head 7A is smaller than the deflection angle 20' of the rolling head 7B, the blank 40 generates forward tensile force between the tail of the rolling wheel 7A and the head of the rolling wheel 7B, the two points are in a line, and the blank 40 is gradually aligned. When the second rolling is finished, the rolled steel tube is guided into the automatic clamping device 32 to be clamped, so that the rolling axial force and the sliding seats depending on the

clamping devices

31 and 32 axially move on the guide rail 11 until the rolling of the whole steel tube blank is finished. The axial offset angle, the rotating speed, the number and the length of the rolling wheels in the rolling head 7A and the rolling head 7B or/and the axial distance between the rolling heads are different according to the requirements of the wall thickness, the diameter, the straightness and the roundness of the steel pipe and other process parameters. If the drawing and rounding die 80 is added, the blank 40 can be reduced, straightened and rounded again. It should be noted that the number of rolling wheels in the rolling head described in this embodiment is characterized in that the number of rolling wheels included in any two rolling heads that are connected back and forth in the processing sequence is odd-even. The metal hollow blank rolled by the rolling, feeding, straightening, rounding and derusting methods is very suitable for directly rolling the external threads of the pipe, and the number of rolling wheels used in the forming and rolling of the external threads of the pipe is different from the number of rolling wheels used in the last step of rolling procedure used in the invention.

Finally, another application of the present invention of reducing diameter, straightening, rounding and descaling by rolling and feeding metal blanks is further described with reference to fig. 14 and 17 and the second embodiment described above. The numerical control derusting process of the rotary screwing machine can be realized through a numerical control device.

1. The deviation angle of the rolling head 7A is 1 degree 05 'and right-handed, the deviation angle of the rolling head 7B is 1 degree 40' and left-handed, the deviation angle of the rolling head 7C is 2 degree 10 'and right-handed, and the deviation angle of the rolling head 7D is 3 degree 10' and left-handed.

2. A metal brush rust removal device is additionally arranged between the rolling

heads

7A and 7B or 80 in the drawing 17 is set as the metal brush rust removal device, so that an oxide layer on the surface of the hollow blank is continuously peeled off for rust removal in the processes of rolling feeding, diameter reducing, straightening and rounding.

In order to increase the rust removing effect, more rolling heads and annular metal brushes can be added, the rotating direction and the speed of the rolling wheels are set to be the same as those of the method, and other parameter designs and settings can refer to the spirit of the invention and are not described again.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art should be able to make various equivalent changes or substitutions without departing from the spirit and scope of the present invention, which is not limited by the foregoing rolling methods and directions, rolling wheel lengths, rolling wheel numbers and mounting patterns, rolling head numbers and mounting patterns, rolling wheel rotational directions, speeds and rotational directions, spacing distances between rolling heads and rolling heads, radial and axial movement patterns of rolling wheel seats, etc. For example: the number of rolling wheels in the front and rear rolling heads or rolling modules for solid blanks may be the same or there may be no odd-even matching requirements, but for hollow blanks the number of rolling wheels should be odd-even matching according to a part of the spirit of the present invention. Another example is: each rolling head of the rolling wheel can be arranged horizontally or vertically; for another example: when the rolling wheel adopts a pattern to draw, the bar with the pattern can be processed after the rolling feeding is straightened and rounded or/and derusted.

Therefore, the protection scope of the present invention is subject to the scope defined by the appended claims.

Claims

1. A metal blank rolling processing module comprises at least one power device and at least one rolling head matched with the power device, wherein the power device provides a rotary driving force for the rolling head, and the rolling head is characterized in that the rolling head comprises at least 2 rolling wheels arranged along the circumference, the axes of the rolling wheels and the axis of a processed metal blank have a deviation angle in the vertical direction, the rolling wheels are cylindrical rolling wheels with smooth outer surfaces or truncated cone-shaped rolling wheels with smooth outer surfaces, when the rolling heads work simultaneously, the rotating speed of the rolling head contacted with the metal blank firstly in two adjacent rolling heads is smaller than that of the rolling head contacted with the metal blank, and the rolling wheels in the two adjacent rolling heads are different in number secondly.

2. The metal blank rolling processing module according to claim 1, wherein the rolling head further comprises a first rolling wheel disc, a second rolling wheel disc, a worm wheel and a connecting pin shaft, the power device drives the worm wheel to rotate so as to drive the rolling head to rotate, the first rolling wheel disc, the second rolling wheel disc and the worm wheel are provided with corresponding radial grooves, workpiece processing working holes and pin shaft holes, the rolling wheel is matched with the radial grooves on the first rolling wheel disc and the second rolling wheel disc through a rolling wheel shaft, and the radial grooves are matched with the mounting surfaces of the rolling wheel in an inclined plane; the first rolling wheel disc and the second rolling wheel disc are mutually connected and fixed at two ends of the worm wheel through connecting pin shafts matched with the pin shaft holes, rolling heads are coaxially formed, rolling wheel shafts of the rolling wheels are respectively provided with inclined planes which are parallel to each other at two ends, and the rolling wheel shafts are arranged on radial grooves of the rolling wheel discs through the inclined planes, so that the deviation angle is formed.

3. The metal blank rolling processing module according to claim 1, wherein the rolling head further comprises a first rolling wheel disc, a second rolling wheel disc, a gear and a connecting pin shaft, the power device drives the gear to rotate so as to drive the rolling head to rotate, the first rolling wheel disc, the second rolling wheel disc and the gear are provided with corresponding radial grooves, workpiece processing working holes and pin shaft holes, the rolling wheel is matched with the radial grooves on the first rolling wheel disc and the second rolling wheel disc through a rolling wheel shaft, and the radial grooves are matched with the mounting surfaces of the rolling wheel in an inclined plane; the first rolling wheel disc and the second rolling wheel disc are mutually connected and fixed at two ends of the gear through connecting pin shafts matched with the pin shaft holes, rolling heads are coaxially formed, rolling wheel shafts of the rolling wheels are respectively provided with inclined planes which are parallel to each other at two ends, and the rolling wheel shafts are arranged on radial grooves of the rolling wheel discs through the inclined planes, so that the deviation angle is formed.

4. The metal blank rolling processing module according to claim 2, wherein the rolling head further comprises a first adjusting disk, a second adjusting disk and an adjusting disk pin shaft, the first adjusting disk and the second adjusting disk are provided with a positioning installation blind hole, an arc-shaped groove, a workpiece processing working hole and a pin shaft hole which are corresponding to each other, the first adjusting disk and the second adjusting disk are respectively and coaxially installed on the outer sides of the first rolling wheel disk and the second rolling wheel disk through the positioning installation blind holes and are connected with each other through the adjusting disk pin shaft, two ends of a rolling wheel shaft of the rolling wheel are further provided with extending parts on the outer sides of the inclined planes, the extending parts of the rolling wheel shaft of the rolling wheel are installed in the arc-shaped groove of the adjusting disk, the rolling wheel shaft of the rolling wheel can be driven to slide in the arc-shaped groove by rotating the adjusting disk, and further the rolling wheel shaft of the rolling wheel is driven to radially move in the radial groove of the rolling wheel disk, thereby changing the radial position or the diameter of the inscribed circle of the rolling wheel.

5. The metal blank roll-forming module of claim 1, wherein the deflection angle is less than 9 degrees.

6. The metal blank roll-forming module of claim 1, wherein the deflection angle is less than 3 degrees.

7. The metal blank roll-finishing module of claim 1, wherein the number of said rolling heads is greater than 2, each rolling head being concentrically disposed one behind the other.

8. The metal blank roll-finishing module of claim 7, wherein the rolling wheels in two adjacent rolling heads have unequal deflection angles.

9. The metal blank rolling processing module according to claim 1, wherein the rolling wheels in the rolling head are frustum-shaped rolling wheels with smooth outer surfaces, and the frustum conicity of the frustum-shaped rolling wheels is 1-3 degrees.

10. The metal blank rolling processing module according to claim 1, wherein the rolling wheels in the rolling head comprise an introduction part and a rolling part, the introduction part is positioned at the front end of the rolling part, the introduction part is a round table top with a smooth outer surface or a round table top with threads on the outer surface, and the conicity of the round table top of the introduction part is 1-29 degrees; the rolling part is a cylindrical surface with a smooth outer surface or a circular table top with a smooth outer surface.

11. A metal blank rolling line comprising a metal blank rolling module according to any one of claims 1 to 10.

12. The metal blank rolling line of claim 11, further comprising a drawing die and/or a metal brush and/or a heating unit disposed at a forward end or upstream of the metal blank rolling module.

13. A method for feeding or tumbling a metal blank using the metal blank tumbling module as claimed in any one of claims 1 to 10, comprising placing the metal blank between the tumbling wheels of the tumbling head and clamping the metal blank, and actuating the power device, wherein the power device rotates the tumbling head to move the metal blank in the axial direction of the tumbling head, thereby feeding or tumbling.

14. A method for straightening a metal blank by using a metal blank rolling processing module according to any one of claims 7 to 8, characterized in that the metal blank is placed between the rolling wheels of the rolling heads at the front end of the processing procedure and the metal blank is clamped, and the diameters of the smallest inscribed circles of the rolling wheels in the respective rolling heads are set to be equal; starting the power device, and driving the rolling head to rotate by the power device; the rotating speed of the rolling head which is firstly contacted with the metal blank in the two adjacent rolling heads is controlled by the power device to be less than that of the rolling head which is secondly contacted with the metal blank, so that the metal blank is subjected to axial tension between the two adjacent rolling heads, and the alignment is realized.

15. A method for descaling a metal blank by using the metal blank rolling process module according to any one of claims 7 to 8, wherein the metal blank is placed between rolling wheels of a rolling head at the front end of the process and the metal blank is clamped, and the diameters of the smallest inscribed circles of the rolling wheels in the respective rolling heads are set to be equal; the deviation angles of the rolling wheels in two adjacent rolling heads are opposite; starting the power device, and driving the rolling head to rotate by the power device; and the rotating directions of two adjacent rolling heads are opposite through the control of the power device, so that the rust removal is realized.

16. A method for descaling a metal blank according to claim 15, wherein a metal brush is provided between two adjacent rolling heads, and the metal brush is used for auxiliary descaling.

17. A method for rounding a metal tube by using the metal blank rolling process module according to claim 8, wherein the metal tube is placed between rolling wheels of a rolling head at the front end of a process and the metal tube is clamped, and the power device is started, and the power device drives the rolling head to rotate; the diameters of the minimum inscribed circles of the rolling wheels in the rolling heads are set to be equal, and due to the fact that the rolling wheels of two adjacent rolling heads are different in number, rolling spiral lines formed on the metal pipe by the two adjacent rolling heads in the rolling process are different, and therefore circle correction is achieved.

18. A method for reducing the diameter of a metal blank by using the metal blank rolling processing module according to any one of claims 1 to 10, wherein the metal blank rolling processing module comprises at least one rolling head having a truncated cone shaped rolling wheel, the difference between the upper base diameter and the lower base diameter of the truncated cone shaped rolling wheel is the amount of diameter reduction required, and the metal blank is placed between the rolling wheels of the rolling head at the front end of the processing procedure and clamped; starting the power device, and driving the rolling head to rotate by the power device; thereby driving the metal blank to move along the axial direction of the rolling head, thereby realizing reducing.