CN109482686B

CN109482686B - Hot bending equipment for motorcycle tubular frame

Info

Publication number: CN109482686B
Application number: CN201811640813.1A
Authority: CN
Inventors: 杨建华
Original assignee: Chongqing Xin Hong Wang Jing Machinery Co Ltd
Current assignee: Chongqing Xin Hong Wang Jing Machinery Co Ltd
Priority date: 2018-12-29
Filing date: 2018-12-29
Publication date: 2020-03-13
Anticipated expiration: 2038-12-29
Also published as: CN109482686A

Abstract

The invention relates to the field of motorcycles, and particularly discloses a hot bending device for a tubular frame of a motorcycle, which comprises a processing table and a die, wherein one side of the die is a bending surface, a strip-shaped groove for containing a pipe fitting and a fan-shaped groove for allowing the end part of the pipe fitting to rotate are arranged on the upper surface of the processing table, the bottom surface of the strip-shaped groove is an arc surface, the strip-shaped groove comprises an installation part, a bending part and a rotating part which are sequentially arranged, one side of the bending part and one side of the rotating part are communicated with one side of a straight edge of the fan-shaped groove, the bottom of the fan-shaped groove is coplanar with the bottom of the strip-shaped; the bending mechanism comprises a clamping block for clamping the end part of the pipe fitting and a walking unit for driving the clamping block to slide in the rotating part or the fan-shaped groove, and the clamping block is in sliding contact with the bottom surface of the rotating part or the bottom surface of the fan-shaped groove. Equipment in this scheme can buckle the pipe fitting, reduces the resilience ability after the pipe fitting buckles simultaneously.

Description

Hot bending equipment for motorcycle tubular frame

Technical Field

The invention belongs to the field of motorcycles, and particularly relates to a hot bending device for a tubular frame of a motorcycle.

Background

The frame of the motorcycle is the outline of the whole motorcycle, and can integrate an engine, a gearbox, a storage battery, a shock absorber, a seat and the like together. In addition, the frame is subjected to the weight of the rider, the influence of inertia during acceleration and deceleration, and deformation caused by oversteer. The frame can be divided into a plate frame and a tubular frame according to whether the frame is formed by pipe fittings or sheet metal parts. The tubular frame is formed by connecting a plurality of pipe fittings in a welding mode, a threaded connection mode and the like, the installation mode of each pipe fitting is simple, the processing technology of the pipe fittings is mature, and the tubular frame is a common frame type in the market.

When the pipe fitting in the tubular frame is processed, the operations of cutting, bending, painting and the like of the pipe fitting are involved. The part of bending wherein is the difficult point of pipe fitting processing, and the processing of conventional buckling generally adopts the pipe fitting device of buckling to buckle the pipe fitting under the normal atmospheric temperature is adjusted, though can conveniently take out the pipe of buckling, improve work efficiency, at the in-process of buckling of pipe fitting, pipe fitting self has stress, produces the resilience under the effect of stress after the pipe fitting takes off easily, causes the size of bending of pipe fitting to have the mistake easily like this.

Disclosure of Invention

The present invention is intended to provide a hot bending apparatus capable of reducing the resilience of a pipe after the pipe is bent.

In order to achieve the above object, the basic scheme of the invention is as follows: the hot bending equipment of the motorcycle tubular frame comprises a processing table and a die, wherein one side of the die is a bending surface, a strip-shaped groove for containing a pipe fitting and a fan-shaped groove for allowing the end part of the pipe fitting to rotate are arranged on the upper surface of the processing table, the bottom surface of the strip-shaped groove is an arc surface, the strip-shaped groove comprises an installation part, a bending part and a rotating part which are sequentially arranged, one sides of the bending part and the rotating part are communicated with one side of a straight edge of the fan-shaped groove, the bottom of the fan-shaped groove is coplanar with the bottom of the strip-shaped groove, the die is fixedly installed in the fan;

the bending mechanism comprises a clamping block for clamping the end part of the pipe fitting and a walking unit for driving the clamping block to slide in the rotating part or the fan-shaped groove, and the clamping block is in sliding contact with the bottom surface of the rotating part or the bottom surface of the fan-shaped groove.

The principle and advantages of the basic scheme are as follows: 1. be equipped with the bar groove that holds the pipe fitting on the upper surface of processing platform, and the bottom surface in bar groove is the cambered surface, after the pipe fitting that will treat the bending placed the bar inslot, the global cambered surface laminating in bar groove of pipe fitting, when the pipe fitting that is located the kink in bar groove and rotation portion is rotating when buckling, the cambered surface of bar groove installation department can carry on spacingly to the pipe fitting, avoids the relative bar groove of pipe fitting to take place axial slip.

2. The clamping block slides in the rotating part or the fan-shaped groove and can clamp the end part of the pipe fitting, and after the end part of the pipe fitting is clamped by the clamping block, the walking unit can drive the clamping block to slide in the rotating part or the fan-shaped groove and apply torsion to the part of the pipe fitting to be bent, so that the pipe fitting is bent smoothly; and after the pipe fitting is buckled, the clamping block can continuously limit the pipe fitting, so that the pipe fitting is continuously attached to the bending surface of the die, the bending part of the pipe fitting is sufficiently shaped, and the resilience deformation of the bending part of the pipe fitting is reduced.

3. One side of the bending part and one side of the rotating part are communicated with one side of the straight edge of the fan-shaped groove, the bottom of the fan-shaped groove is coplanar with the bottom of the strip-shaped groove, and the bending surface of the mold is opposite to the bending part; when the pipe fitting is twisted towards the direction of the die by the clamping block, the peripheral surface of the pipe fitting slides into the fan-shaped groove from the strip-shaped groove, and the bottom of the fan-shaped groove is coplanar with the bottom of the strip-shaped groove, so that the pipe fitting slides more smoothly and quickly, and the peripheral surface of the pipe fitting is prevented from being scratched; meanwhile, the bending surface of the die is opposite to the bending part of the strip-shaped groove, so that the pipe fitting at the bending part is bent.

To sum up, be equipped with processing platform, mould and press from both sides tight piece in this equipment, and be equipped with bar groove and fan-shaped groove at the processing bench, in, press from both sides tight piece and can press from both sides tightly the one end of pipe fitting, press from both sides tight piece and can buckle the pipe fitting to the direction of mould, this in-process pipe fitting slides in bar groove and fan-shaped groove, it can carry out the clamp that lasts to press from both sides tight spacing to the pipe fitting to press from both sides tight piece, let the pipe fitting abundant with the mould laminating, the department of buckling of pipe fitting is buckled to the design in this process, can the effectual resilience deformation that reduces pipe.

Further, still include heating mechanism, heating mechanism includes the power, a plurality of high frequency heating coil and a plurality of solid fixed ring, gu fixed ring coaxial slide sets up in the kink, high frequency heating coil fixed mounting is in the fixed ring, and high frequency heating coil's both ends are worn out from solid fixed ring and are connected with the high frequency heating coil in the adjacent fixed ring, and the free end that is located the high frequency heating coil of kink one end is connected with the positive pole of power, and the free end that is located the high frequency heating coil of the kink other end is connected with the negative pole of power.

All the fixing rings are coaxially arranged in the bending portions in a sliding mode, when the pipe fitting is placed in the strip-shaped groove, the pipe fitting needs to penetrate through the fixing rings, and the high-frequency heating coils are arranged in the fixing rings and can carry out high-frequency heating on the pipe fitting in the fixing rings, so that the pipe fitting is easier to bend and deform after being heated, the bending portion of the pipe fitting is more difficult to rebound after being cooled, and the bending accuracy of the pipe fitting is further guaranteed; simultaneously, the high-frequency heating coils in the two adjacent fixing rings are connected, all the fixing rings are connected into a whole, when the end part of the clamping block driving the pipe fitting rotates around the bending part, the pipe fitting can drive the fixing rings and the high-frequency heating coils to synchronously rotate, the fixing rings are in contact with the outer wall of the mold, the distance between the fixing rings and the fixing rings under the connection of the high-frequency heating coils is kept relatively constant, and the bending of the pipe fitting is not influenced. Meanwhile, the distance between the high-frequency heating coil and the peripheral surface of the pipe fitting is kept constant under the limitation of the fixing ring, so that the peripheral surface of the pipe fitting is uniformly heated.

Further, a pressure spring is fixedly installed between every two adjacent fixing rings and arranged on one side, close to the bending surface of the mold, of each fixing ring; and a tension spring is fixedly installed between every two adjacent fixing rings, is arranged on one side of the fixing ring away from the bending surface of the mold, and is arranged opposite to the compression spring.

When the direction of fixed hoop mould removed, one side that the pipe fitting is close to the pressure spring was extruded, and one side that the pipe fitting is close to the extension spring is stretched, and the pressure spring also is by synchronous extrusion this moment, and the extension spring is by synchronous stretching, and the setting of extension spring and pressure spring is in order to let solid fixed ring and solid fixed interval between the ring be maintained, is convenient for let all solid fixed ring returns to the coaxial state in as to the bar groove simultaneously, is convenient for carry out buckling processing to next pipe fitting.

Furthermore, the bottom of the fan-shaped groove is provided with a sliding groove for the clamping block to slide, and the track of the sliding groove is consistent with the moving track of the clamping block.

The setting up of sliding tray can be preset the removal orbit of clamp splice, lets the condition that the orbit skew can not appear when removing of clamp splice, and the clamp splice lets the bending process of pipe fitting more stable.

Furthermore, an annular cavity is arranged in the clamping block, a convex block is arranged at the bottom of the annular cavity, and a clamping hole is arranged in the convex block and is opposite to the side wall of the annular cavity; a wedge block is arranged in the clamping hole in a sliding mode, a spring is arranged in the clamping hole, one end of the spring is fixedly connected with the wedge block, the other end of the spring is fixedly connected with the inner wall of the clamping block, and the wedge surface of the wedge block is opposite to the fixing ring.

When the end part of the pipe fitting is inserted into the clamping block, the end surface of the pipe fitting abuts against the wedge surface of the wedge block, the wedge block is extruded into the clamping block, the spring contracts, the elastic force of the spring acts on the wedge block, and the wedge block fully abuts against the inner wall of the pipe fitting to fix and limit the end part of the pipe fitting.

Further, the upper surface of the mold is higher than the top of the fixing ring.

When the surfaces of the fixing ring and the die are abutted, the outer surface of the die can be fully attached to the outer wall of the fixing ring, and the die can provide stable support for bending of the pipe fitting.

Further, the bottom of the clamping block is rotatably provided with a roller, and the axis of the roller is parallel to the axis of the fixing ring.

When the clamping block slides along the sliding groove, the roller at the bottom of the clamping block is in rolling contact with the bottom surface of the sliding groove, so that the friction resistance of the walking unit when the walking unit drives the clamping block to move can be reduced, and the energy consumption of the clamping block during moving is reduced; the relative position relation of the roller and the fixing ring is limited, so that the rotation direction of the roller is the same as the moving direction of the end part of the pipe fitting, and the roller can keep stable rotation capacity.

Drawings

FIG. 1 is a front cross-sectional view of a tube frame for a motorcycle according to the present invention;

FIG. 2 is a top view of FIG. 1;

fig. 3 is an enlarged view of the clamping block of fig. 1.

Detailed Description

The following is further detailed by the specific embodiments:

reference numerals in the drawings of the specification include: the machining table 10, the strip groove 101, the mounting portion 111, the bent portion 121, the rotating portion 131, the sector groove 102, the slide groove 103, the ejection groove 104, the die 20, the curved surface 201, the clamp block 30, the guide frame 301, the guide rail 302, the roller 303, the annular cavity 304, the projection 305, the detent hole 306, the wedge 307, the spring 308, the high-frequency heating coil 401, the fixing ring 402, the compression spring 403, the tension spring 404, and the pipe 50.

The embodiments are substantially as shown in figures 1, 2 and 3: the hot bending equipment of the motorcycle tubular frame comprises a processing table 10, a die 20, a bending mechanism and a heating mechanism; the upper surface of the processing table 10 is provided with a strip-shaped groove 101 for containing the pipe 50 and a fan-shaped groove 102 for allowing the end part of the pipe 50 to rotate, and the bottom surface of the strip-shaped groove 101 is an arc surface attached to the side surface of the pipe 50; as shown in fig. 1 and 2, the strip groove 101 includes a mounting portion 111, a bending portion 121, and a rotating portion 131, which are arranged in this order from left to right.

As shown in fig. 2, the die 20 is a rectangular parallelepiped, the lower right side of the die 20 is a curved surface 201 of the bent pipe 50, the upper sides of the bent portion 121 and the rotating portion 131 are communicated with the lower straight edge of the fan-shaped groove 102, the bottom of the fan-shaped groove 102 is coplanar with the bottom of the strip-shaped groove 101, the die 20 is welded in the fan-shaped groove 102 of the machining table 10, and the lower side of the curved surface 201 of the die 20 is opposite to the bent portion 121.

As shown in fig. 1, the bending mechanism comprises a clamping block 30 and a traveling unit, the traveling unit comprises a guide frame 301 and a guide rail 302 for driving the clamping block 30 to move, the guide frame 301 is horizontally and fixedly installed above the processing table 10, and the guide rail 302 is welded with the lower surface of the guide frame 301; the bottom of the fan-shaped groove 102 is provided with an arc-shaped sliding groove 103, and the track of the sliding groove 103 is consistent with the moving track of the clamping block 30.

As shown in fig. 2, the heating mechanism includes a power supply, six high-frequency heating coils 401 and six fixing rings 402, the fixing rings 402 are coaxially slidably disposed in the bending portions 121, the high-frequency heating coils 401 are fixedly mounted in the fixing rings 402, and both ends of the high-frequency heating coils 401 penetrate out of the fixing rings 402 and are connected to the high-frequency heating coils 401 in the adjacent fixing rings 402, the free end of the leftmost high-frequency heating coil 401 is connected to the positive electrode of the power supply, and the free end of the rightmost high-frequency heating coil 401 is connected to the negative electrode of the; a pressure spring 403 is fixedly installed between every two adjacent fixing rings 402, and the pressure spring 403 is arranged on the upper sides of the fixing rings 402; a tension spring 404 is fixedly installed between two adjacent fixing rings 402, the tension spring 404 is arranged on the lower side of the fixing rings 402, and the tension spring 404 is opposite to the compression spring 403 and is located on the same horizontal plane.

As shown in fig. 3, the bottom of the clamping block 30 is rotatably provided with a roller 303, the axis of the roller 303 is parallel to the axis of the fixing ring 402, and the roller 303 at the bottom of the clamping block 30 is in sliding contact with the bottom surface of the sliding groove 103; as shown in fig. 2, an exit groove 104 for exiting the clamp block 30 is provided at the left end of the slide groove 103.

As shown in fig. 3, an annular cavity 304 is provided in the clamping block 30, a protrusion 305 integrally formed with the clamping block 30 is provided at the bottom of the annular cavity 304, two retaining holes 306 are provided on the side wall of the protrusion 305, and the retaining holes 306 are opposite to the side wall of the annular cavity 304; a wedge block 307 is arranged in the clamping hole 306 in a sliding manner, a spring 308 is arranged in the clamping hole 306, one end of the spring 308 is fixedly connected with the wedge block 307, the other end of the spring 308 is fixedly connected with the inner wall of the clamping block, and the wedge surface of the wedge block 307 is opposite to the fixing ring 402.

Further, the upper surface of the mold 20 is higher than the top of the fixing ring 402.

When the hot bending device of the motorcycle tubular frame in the embodiment is not used, the hot bending device is in an initial state as shown in fig. 2, and the axes of all the fixing rings 402, the high-frequency heating coil 401 and the clamping blocks 30 are located on the same horizontal straight line.

The hot bending process of the pipe 50 includes an installation step, a hot bending step, and a removal step of the pipe 50 in this order.

Installation of the pipe 50: horizontally inserting the pipe 50 to be bent into the strip-shaped groove 101 from left to right, wherein the bottom surface of the strip-shaped groove 101 is attached to the side surface of the pipe 50, the bent part of the pipe 50 is located at the fixing ring 402, and the outer wall of the pipe 50 is in contact with the inner wall of the fixing ring 402; the right end of the pipe 50 is horizontally inserted into the annular cavity 304 as shown in fig. 3, in the process of inserting the pipe 50, the end surface of the pipe 50 abuts against the wedge surface of the wedge 307, the wedge 307 is extruded into the clamping block, the spring 308 contracts, the elastic force of the spring 308 acts on the wedge 307, and the wedge 307 fully abuts against the inner wall of the pipe 50, so that the right end of the pipe 50 is fixed and limited.

And (3) hot bending: the power supply is turned on, the current in the high-frequency heating coil 401 flows, and because the high-frequency heating coil 401 is arranged in the fixing ring 402 in a coil shape, the high-frequency heating coil 401 can perform high-frequency heating on the pipe 50 installed in the fixing ring 402, so that the bending position of the pipe 50 can quickly reach 900 plus 1000 ℃, the bending position of the pipe 50 is easy to bend, the distance between the high-frequency heating coil 401 and the peripheral surface of the pipe 50 is kept constant under the limitation of the fixing ring 402, and the peripheral surface of the pipe 50 is uniformly heated; after the temperature is kept constant for 10S, the guide rail 302 is started, the guide rail 302 drives the clamping block 30 to slide along the sliding groove 103, the roller 303 slides in the sliding groove 103, and at the moment, the clamping block 30 drives the right end of the pipe fitting 50 to synchronously rotate around the bent part of the pipe fitting 50 along the sliding groove 103; during the rotation of the right end of the pipe 50, the bent part 121 of the pipe 50 is attached to the bending surface 201 of the mold 20, during the attachment, the fixing ring 402 and the right end of the pipe 50 slide in the fan-shaped groove 102, meanwhile, the pressure spring 403 on the upper side of the fixing ring 402 is compressed as shown in fig. 2, the tension spring 404 on the lower side of the fixing ring 402 is stretched, the high-frequency heating coil 401 in the fixing ring 402 continuously heats the pipe 50, one side of the pipe 50 close to the pressure spring 403 is extruded, one side of the pipe 50 close to the tension spring 404 is stretched, so that the pipe 50 is bent, and during the bending, the inner wall of the fixing ring 402 abuts against the peripheral surface of the pipe 50, so; when the block 30 to be clamped slides to the left side of the sliding groove 103, the power supply is turned off, and the pipe 50 is cooled to room temperature; because the mould 20, the fixing ring 402 and the clamping block 30 can limit the bending position of the pipe fitting 50 in the cooling process, the rebound deformation of the bending position of the pipe fitting 50 can be reduced.

Disassembling: when the pipe 50 is cooled to room temperature, the guide rails 302 move the clamp blocks 30 upward of the withdrawing groove 104, so that the upper end of the pipe 50 is loosened, and then the pipe 50 located in the fixing ring 402 and the strip groove 101 is withdrawn.

Claims

1. The hot bending equipment for the motorcycle tubular frame comprises a processing table and a die, wherein one side of the die is a bending surface, and the hot bending equipment is characterized in that a strip-shaped groove for containing a pipe fitting and a fan-shaped groove for allowing the end part of the pipe fitting to rotate are arranged on the upper surface of the processing table, the bottom surface of the strip-shaped groove is an arc surface, the strip-shaped groove comprises an installation part, a bending part and a rotating part which are sequentially arranged, one side of the bending part and one side of the rotating part are communicated with one side of a straight edge of the fan-shaped groove, the bottom of the fan-shaped groove is coplanar with the bottom of the strip-shaped groove, the die is fixedly installed;

the bending mechanism comprises a clamping block for clamping the end part of the pipe fitting and a walking unit for driving the clamping block to slide in the rotating part or the fan-shaped groove, and the clamping block is in sliding contact with the bottom surface of the rotating part or the bottom surface of the fan-shaped groove; the heating device is characterized by further comprising a heating mechanism, wherein the heating mechanism comprises a power supply, a plurality of high-frequency heating coils and a plurality of fixing rings, the fixing rings are coaxially arranged in the bending portions in a sliding mode, the high-frequency heating coils are fixedly arranged in the fixing rings, two ends of each high-frequency heating coil penetrate out of the fixing rings and are connected with the high-frequency heating coils in the adjacent fixing rings, the free ends of the high-frequency heating coils at one ends of the bending portions are connected with the positive electrode of the power supply, and the free ends of the high-frequency; a pressure spring is fixedly arranged between every two adjacent fixing rings and is arranged on one side, close to the bending surface of the mold, of each fixing ring; two adjacent fixed ring fixed mounting has the extension spring between, and the extension spring setting is kept away from the one side of mould curved surface at fixed ring, and the extension spring sets up with the pressure spring is relative.

2. The motorcycle tubular frame hot-bending apparatus according to claim 1, wherein the bottom of the sector groove is provided with a sliding groove for the clamping block to slide, and the track of the sliding groove is consistent with the moving track of the clamping block.

3. The motorcycle tubular frame hot-bending device according to claim 2, wherein an annular cavity is formed in the clamping block, a protruding block is arranged at the bottom of the annular cavity, and a clamping hole is formed in the protruding block and is opposite to the side wall of the annular cavity; the downthehole slidable mounting that is equipped with of screens has the voussoir, installs the spring in the screens hole, the one end and the voussoir fixed connection of spring, the other end and the inner wall fixed connection of screens piece of spring, the wedge surface and the solid fixed ring of voussoir are relative.

4. A motorcycle tube frame hot bending apparatus as claimed in claim 3, wherein the upper surface of the mold is higher than the top of the fixing ring.

5. The motorcycle tube frame hot bending apparatus according to claim 4, wherein the bottom of the clamping block is rotatably provided with a roller, and the axis of the roller is parallel to the axis of the fixing ring.