CN215657224U

CN215657224U - Integral new material spiral pipe rolling cutter and spiral pipe production device

Info

Publication number: CN215657224U
Application number: CN202122315286.0U
Authority: CN
Inventors: 付军玲
Original assignee: Zhengzhou Norco Precision Technology Co ltd
Current assignee: Zhengzhou Norco Precision Technology Co ltd
Priority date: 2021-09-22
Filing date: 2021-09-22
Publication date: 2022-01-28
Anticipated expiration: 2031-09-22

Abstract

The utility model discloses an integral new material spiral pipe rolling cutter and a spiral pipe production device, which comprise a rolling cutter and forming cutters, wherein the diameters of the rolling cutters are sequentially increased from the first to the last, and the diameters of the forming cutters are unchanged; the cutting edge of each rolling cutter is a bilateral cutting edge, the width of the forming surface at the edge of each forming cutter is gradually increased from the first to the last, and the included angle of the working surface is gradually decreased. The rolling cutter changes a mechanism for rolling the single-side blade of the cutter in the prior art into a double-side blade, and the blade is arranged into an arc shape, so that the strength of the blade is increased, the abrasion is reduced, and the service life is prolonged by at least 3 times; in addition, the forming surface of the forming cutter is of a gradually-increased structure, one-time forming is changed into gradual forming, stress of each cutter can be reduced, the problem that the blade is easy to damage is solved, the service life of the blade is prolonged, and meanwhile, the forming effect is better through practical verification.

Description

Integral new material spiral pipe rolling cutter and spiral pipe production device

Technical Field

The utility model belongs to the field of heat exchange equipment processing, and particularly relates to an integral new-material spiral pipe rolling cutter.

Background

The spiral finned tube is a high-efficiency heat exchange element and is widely applied to the fields of petroleum, chemical engineering, refrigeration and the like. The existing integral spiral finned tube is directly rolled with spiral fins on the surface of a metal pipe fitting, and a three-roll rotary rolling technology is generally adopted. In the manufacturing process, the tube blank is driven by the rolling cutter to rotate and move forward, and the groove between the upper blades of the rolling cutter and the hole pattern formed by the mandrel enable the tube blank to be gradually processed into the finned tube.

The adopted rolling cutter usually adopts a plurality of detachable circular blades sleeved on a cutter shaft of the rolling cutter, the blades are fixed by positioning pieces, and the blades are arranged in parallel vertical to the axial lead of the cutter shaft. In the processing process of the integral spiral finned tube, the tube blank is driven to move forwards by the axial force of the rolling cutter on the one hand, and the fins on the surface of the tube blank are heightened by radial extrusion of the rolling cutter on the other hand.

Chinese patent No. 201810499911.1 discloses a finned tube and a production device of the finned tube and a production method of the finned tube, the rolling device disclosed by the patent comprises a rotating shaft, and a rolling cutter and a forming cutter which are arranged on the rotating shaft, wherein the rolling cutter and the forming cutter are respectively provided with a plurality of groups, the diameters of the rolling cutters are sequentially increased from front to back, and the figure shows that the cutting edges of the rolling cutters are single-side cutting edges facing the inlet end of a tube blank; the diameter of the forming cutter is unchanged, positioning sleeves are arranged between adjacent rolling cutters, between the forming cutters and between the rolling cutters and the forming cutters, and locking sleeves are respectively arranged at the front and the back of each positioning sleeve; the forming cutter comprises an inner layer, a middle layer and an outer layer; the inner layer is arranged in a hollow round shape, a bulge is arranged on one side of the middle layer, and a groove is arranged on the other side of the middle layer; a left boss and a right boss are respectively arranged on two sides of the outer layer; the left boss and the right boss are arranged like triangles, the narrow end 4 is arranged at one end of the left boss and the right boss close to the outer layer, and the wide end is arranged at one end of the left boss and the right boss close to the middle layer; the left boss and the right boss are distributed on the outer layer in an annular array by taking the center of the forming cutter as a circle center. The rolling effect of the single-edge cutting edge rolling cutter and the forming cutter with a complex structure is not good through practical verification.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to overcoming the above-mentioned shortcomings of the prior art, and provides a new material-integrated spiral pipe rolling tool and a spiral pipe manufacturing apparatus using the same.

In order to solve the technical problems, the utility model adopts a technical scheme that: the integral new material spiral pipe rolling cutter comprises at least ten rolling cutters and at least three forming cutters, wherein the rolling cutters are arranged at the front ends of the forming cutters in the rolling movement direction of a pipe blank, the diameters of the rolling cutters are sequentially increased from the first to the last, and the diameters of the forming cutters are unchanged; the cutting edge of each rolling cutter is a bilateral cutting edge, the width of the forming surface at the edge of each forming cutter is gradually increased from the first to the last, and the included angle of the working surface is gradually decreased.

In another embodiment of the utility model, the adjacent rolling cutters, the forming cutters and the rolling cutters and the forming cutters are directly and closely pressed against each other.

In another embodiment of the utility model, the cutting edge of each rolling cutter is arc-shaped, and the radian range is 0.5-1 rad.

In another embodiment of the utility model, the included angle alpha of the working surface of each forming cutter is in the range of 10-13 degrees, and the increment and decrement is 0.4-0.6 degrees.

In another embodiment of the utility model, the increment of the diameter of the rolling cutter is 2-3 mm.

In another embodiment of the utility model, the diameters of the rolling cutter and the forming cutter are both 150-180 mm.

The technical scheme adopted by the spiral pipe production device is as follows: the rolling device comprises a fixing frame, three groups of rolling devices which are arranged on the fixing frame and are circumferentially and uniformly distributed and a power driving mechanism which is used for driving a tube blank to move along a rolling movement direction, wherein each group of rolling devices comprises a cutter shaft and a rolling cutter which is sleeved on the cutter shaft, the rolling cutter comprises a rolling cutter and a forming cutter, and the rolling device is characterized in that the number of the rolling cutters is at least ten, the number of the forming cutters is at least three, the rolling cutters are arranged at the front ends of the forming cutters along the rolling movement direction of the tube blank, the diameters of the rolling cutters are sequentially increased from the first to the last, and the diameters of the forming cutters are unchanged; the cutting edge of each rolling cutter is a bilateral cutting edge, the width of the forming surface at the edge of each forming cutter is gradually increased from the first to the last, and the included angle of the working surface is gradually decreased.

In another embodiment of the utility model, the cutting edge of each rolling cutter is arc-shaped, and the radian range is 0.5-1 rad; the included angle alpha of the working surface of each forming cutter is 10-13 degrees, and the increment and decrement is 0.4-0.6 degrees.

In another embodiment of the utility model, the increment of the diameter of the rolling cutter is 2-3 mm; the diameters of the rolling cutter and the forming cutter are both 150-180 mm.

The utility model has the beneficial effects that:

the rolling cutter and the spiral pipe production device using the same change a mechanism for rolling a single-side blade of the cutter in the prior art into a double-side blade, and the blade is arranged into an arc shape, so that the strength of the blade is increased, the abrasion is reduced, and the service life is prolonged by at least 3 times; in addition, the forming surface of the forming cutter is of a gradually-increased structure, one-time forming is changed into gradual forming, stress of each cutter can be reduced, the problem that the blade is easy to damage is solved, the service life of the blade is prolonged, and meanwhile, the forming effect is better through practical verification.

Drawings

FIG. 1 is a schematic view of the construction of the integrated new material spiral tube rolling tool of the present invention;

fig. 2 is a view showing the arrangement of rolling cutters of the spiral pipe manufacturing apparatus of the present invention.

Detailed Description

In order to facilitate an understanding of the utility model, the utility model is described in more detail below with reference to the accompanying drawings and specific examples. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It is to be noted that, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. The terms "center," "bottom," "top," "inner," "outer," and the like refer to an orientation or positional relationship based on what is shown in the drawings, merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced components must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be considered as limiting the scope of the present invention.

As shown in fig. 1, the structural diagram of the integral new material spiral tube rolling cutter of the utility model is a schematic diagram, and as can be seen from the diagram, the rolling cutter comprises a rolling cutter 1 and a forming cutter 2, the number of the rolling cutters is at least ten, the number of the forming cutters is at least three, and the rolling cutter is arranged in front of the forming cutter along the rolling movement direction of the tube blank, the diameters of the rolling cutters are increased from the first to the last in sequence, and the diameters of the forming cutters are unchanged; the cutting edge of each rolling cutter is a bilateral cutting edge, the width of the forming surface 5 at the edge of the forming cutter is gradually increased from the first to the last, and the included angle of the working surface is gradually decreased.

Furthermore, adjacent rolling cutters, forming cutters and rolling cutters and forming cutters are directly pressed and attached to each other, positioning sleeves are not additionally arranged among the cutters, and the rolling effect of the cutters is guaranteed.

In addition, the axial thickness of each rolling cutter and each forming cutter is the same in the embodiment, so that the machining is convenient.

Further, the cutting edge of each rolling cutter in the embodiment is arc-shaped, and the radian range is 0.5-1 rad, so that the purpose of increasing the wear resistance of the rolling cutter is achieved.

Preferably, the included angle alpha of the working surface of each forming cutter ranges from 10 degrees to 13 degrees, and the gradual reduction amount ranges from 0.4 degrees to 0.6 degrees.

Preferably, the increment of the diameter of the rolling cutter is 2-3 mm.

Preferably, the diameters of the rolling cutter and the forming cutter are both 150-180 mm.

Preferably, the number of rolling cutters is 7-10, and the number of forming cutters is 6-9.

As shown in fig. 2, the present invention further provides a spiral pipe production apparatus, which includes a fixing frame (not shown in the figure), three sets of rolling devices installed on the fixing frame and uniformly distributed circumferentially, and a power driving mechanism for driving the pipe blank 6 to move along the rolling movement direction, wherein each set of rolling device includes a cutter shaft 4 and a rolling cutter sleeved on the cutter shaft, flanges 3 are provided at the front and the rear of the rolling cutter, and the used rolling cutters are as described above, and will not be described again here.

The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or any other related technical fields, are included in the scope of the present invention.

Claims

1. An integral new material spiral pipe rolling cutter comprises at least ten rolling cutters and at least three forming cutters, wherein the rolling cutters are arranged at the front ends of the forming cutters along the rolling movement direction of a pipe blank, the diameters of the rolling cutters are sequentially increased from the first to the last, and the diameters of the forming cutters are unchanged; the cutting edge of each rolling cutter is a bilateral cutting edge, the width of the forming surface at the edge of each forming cutter is gradually increased from the first to the last, and the included angle of the working surface is gradually decreased.

2. The integral new material spiral pipe rolling cutter as claimed in claim 1, wherein the adjacent rolling cutters, the forming cutter, and both the rolling cutters and the forming cutter are directly pressed against each other.

3. The integral new material spiral tube rolling cutter as claimed in claim 2, wherein the cutting edge of each rolling cutter is circular arc with a radian in the range of 0.5 to 1 rad.

4. The integral new material spiral tube rolling cutter as claimed in claim 3, wherein the included angle α of the working faces of the respective forming cutters ranges from 10 ° to 13 °, and the decrement ranges from 0.4 ° to 0.6 °.

5. The integral new material spiral tube rolling cutter as claimed in claim 4, wherein the increment of the rolling cutter diameter is 2-3 mm.

6. The integral new material spiral tube rolling cutter as claimed in claim 5, wherein the rolling cutter and the forming cutter have a diameter of 150-180 mm.

7. A spiral pipe production device comprises a fixing frame, three groups of rolling devices which are arranged on the fixing frame and are circumferentially and uniformly distributed, and a power driving mechanism used for driving a pipe blank to move along a rolling movement direction, wherein each group of rolling devices comprises a cutter shaft and a rolling cutter sleeved on the cutter shaft, and each rolling cutter comprises a rolling cutter and a forming cutter; the cutting edge of each rolling cutter is a bilateral cutting edge, the width of the forming surface at the edge of each forming cutter is gradually increased from the first to the last, and the included angle of the working surface is gradually decreased.

8. A spiral pipe producing apparatus as claimed in claim 7, wherein the adjacent rolling cutters, the forming cutters, and the rolling cutters and the forming cutters are directly pressed against each other.

9. A spiral tube producing apparatus as recited in claim 8, wherein the cutting edge of each rolling cutter is arc-shaped with a radian in the range of 0.5 to 1 rad; the included angle alpha of the working surface of each forming cutter is 10-13 degrees, and the increment and decrement is 0.4-0.6 degrees.

10. A spiral tube producing apparatus according to claim 9, wherein the increment of the rolling cutter diameter is 2 to 3 mm; the diameters of the rolling cutter and the forming cutter are both 150-180 mm.