阅读说明：本技术 自行车车架连接结构、应用该结构的车架及其胶合工艺 (Bicycle frame connecting structure, bicycle frame applying structure and gluing process of bicycle frame ) 是由 许秀政 许沐闳 刘剑明 马建军 于 2021-06-24 设计创作，主要内容包括：本发明公开了自行车车架连接结构、应用该结构的车架及其胶合工艺,包括有互相配合的公接头和母接头,母接头从外向内依次设有第一环形平面、环形台阶凸角、第一环形内侧壁面、环形内侧壁凹角、第二环形内侧壁面、环形内侧壁凸角和第三环形内侧壁面,公接头依次设有第一环形外侧壁面、环形外侧壁凹角、第二环形外侧壁面、环形外侧壁凸角、第三环形外侧壁面、环形台阶凹角、第二环形平面,无需使用补纱料或补纱套管,使车架一体感较好；且胶合区域只有一个末端,车架强度较好,不易开裂；公母接头在涂胶后直接插接胶合和加热处理,工序较少且工时较短,由于胶合区域连续且平整,后期进行简单的打磨处理即可,减少工时,降低加工成本,减小生产周期。(The invention discloses a bicycle frame connecting structure, a bicycle frame applying the structure and a gluing process thereof, and the bicycle frame connecting structure comprises a male joint and a female joint which are matched with each other, wherein the female joint is sequentially provided with a first annular plane, an annular step convex angle, a first annular inner side wall surface, an annular inner side wall concave angle, a second annular inner side wall surface, an annular inner side wall convex angle and a third annular inner side wall surface from outside to inside; the gluing area is only provided with one tail end, so that the frame has high strength and is not easy to crack; the male connector and the female connector are directly spliced, glued and heated after gluing, the process is less, the working hours are shorter, the gluing area is continuous and smooth, and the later period is simply polished, so that the working hours are reduced, the processing cost is reduced, and the production period is shortened.)

1. A connecting structure between bicycle pipe fittings is characterized by comprising a carbon fiber material female joint pipe fitting (1) and a carbon fiber material male joint pipe fitting (2) which are spliced and bonded together through glue, wherein a female joint (11) with a glued inner wall is arranged at one end of the carbon fiber material female joint pipe fitting (1), a male joint (21) with a glued outer wall and used for being spliced and bonded with the female joint (11) is arranged at one end of the carbon fiber material male joint pipe fitting (2), a first annular plane (12), an annular step convex angle (13) with an angle of 270 degrees, a first annular inner side wall surface (14), an annular inner side wall concave angle (15) with an angle larger than 90 degrees and smaller than 180 degrees, a second annular inner side wall surface (16), an annular inner side wall convex angle (17) with an angle larger than 180 degrees and smaller than 270 degrees and a third annular inner side wall surface (18) are sequentially arranged from outside to inside,

the male connector (21) is sequentially provided with a first annular outer side wall surface (22) matched with the third annular inner side wall surface (18), an annular outer side wall reentrant angle (23) matched with the annular inner side wall reentrant angle (17), a second annular outer side wall surface (24) matched with the second annular inner side wall (16), an annular outer side wall reentrant angle (25) which is matched with the annular inner side wall reentrant angle (15) and is a right angle, a third annular outer side wall surface (26) matched with the first annular inner side wall surface (14), an annular step reentrant angle (27) matched with the annular step reentrant angle (13), and a second annular plane (28) matched with the first annular plane (12).

2. Bicycle frame connection according to claim 1, characterized in that the diameter Φ 1 of the outer wall of the female joint (11) is the same as the diameter Φ 2 of the outer wall of the male joint (21).

3. The bicycle frame attachment structure according to claim 1, wherein the length D1 of the first annular outer side wall surface (22) is greater than the length D2 of the third annular outer side wall surface (26) and the length D3 of the first annular inner side wall surface (14), respectively.

4. Bicycle frame connection according to claim 1, characterized in that the length D4 of the first annular plane (12) and the length D5 of the second annular plane (28) are identical and are both 0.3-0.4 mm.

5. A frame is characterized by comprising a head pipe fitting (3), a middle pipe fitting (4) and a lower pipe fitting (5), wherein the head pipe fitting (3) is made of carbon fiber materials, a first joint (31) and a second joint (32) are arranged on the head pipe fitting (3), a third joint (41) connected with the first joint (31) in an inserted mode and a fourth joint (42) connected with the lower pipe fitting (5) are respectively arranged on the middle pipe fitting (4), two fifth joints (43) are arranged on the rear side of the middle pipe fitting (4), a sixth joint (51) connected with the second joint (32) through a lower pipe (6) made of carbon fiber materials and a seventh joint (52) connected with the fourth joint (42) in an inserted mode are respectively arranged on the lower pipe fitting (5), two eighth joints (53) are arranged on the rear side of the lower pipe fitting (5), a back fork pipe (7) made of carbon fiber materials is connected between each fifth joint (43) and each eighth joint (53), a triangular structure is formed among the head pipe fitting (3), the middle pipe fitting (4), the lower pipe fitting (5) and the lower pipe (6), a triangular structure is formed among the middle pipe fitting (4), the lower pipe fitting (5) and the single back fork pipe (7), first pipe fitting joints (61) are arranged at two ends of the lower pipe (6), second pipe fitting joints (71) are arranged at two ends of the back fork pipe (7), one of the two joints in plug connection is a male joint (21), the other one is a female joint (11), the female joint (11) is sequentially provided with a first annular plane (12), an annular step convex angle (13) with an angle of 270 degrees, a first annular inner side wall (14), an annular inner side wall concave angle (15) with an angle larger than 90 degrees and smaller than 180 degrees from outside to inside, A second annular inner sidewall surface (16), an annular inner sidewall lobe (17) having an angle greater than 180 DEG and less than 270 DEG, and a third annular inner sidewall surface (18), the male connector (21) is sequentially provided with a first annular outer side wall surface (22) matched with the third annular inner side wall surface (18), an annular outer side wall reentrant angle (23) matched with the annular inner side wall reentrant angle (17), a second annular outer side wall surface (24) matched with the second annular inner side wall (16), an annular outer side wall reentrant angle (25) which is matched with the annular inner side wall reentrant angle (15) and is in a right angle, a third annular outer side wall surface (26) matched with the first annular inner side wall surface (14), an annular step reentrant angle (27) matched with the annular step reentrant angle (13), and a second annular plane (28) matched with the first annular plane (12) from outside to inside.

6. The frame according to claim 5, characterized in that the head pipe fitting (3) is provided with a vertical through hole (33), a front fork pipe (8) is connected in the vertical through hole (33) in a penetrating manner, and a transverse through hole (10) for mounting the frame formed after the combination of the pipe fittings on the gluing jig (9) is arranged at the lower end of the front fork pipe (8).

7. Frame according to claim 5, characterized in that the rear fork tube (7) is a V-shaped tube.

8. Frame according to claim 5, characterized in that the lower ends of the down tube (5) and the rear fork (7) are respectively provided with a transverse through hole (10) for mounting the frame formed by combining the tubes on a gluing jig (9).

9. Gluing process applied to a vehicle frame according to any one of claims 5 to 8, characterized in that it comprises the following steps:

1) manufacturing a frame fitting, wherein the frame fitting comprises the head pipe fitting (3), a middle pipe fitting (4), a lower pipe fitting (5), a lower pipe (6), a front fork pipe (8) and a rear fork pipe (7);

2) reaming the female connectors on the frame fittings, performing sand blasting coarsening on the male connectors and the female connectors, cleaning a gluing area, and performing weighting and wiping on the pipe fittings before gluing;

3) gluing the outer wall of each male connector and the inner wall of each female connector on each frame accessory, splicing and gluing the male connectors and the female connectors on adjacent frame accessories to form a frame, placing the frame on a jig/jig group, locking and heating;

4) and performing glue overflow treatment on the frame, transferring the frame to a semi-finished product bin after QC inspection, and performing soil supplement treatment on the gluing area.

10. The gluing process of vehicle frame according to claim 9, wherein the heating process is to bake the gluing area using an electric heating housing with an electric heating plate inside or to transfer the vehicle frame and the jig/fixture set into a baking oven for baking.

Technical Field

The invention relates to a bicycle, in particular to a bicycle frame connecting structure, a bicycle frame applying the structure and a gluing process thereof.

Background

The existing bicycle frame gluing process is generally characterized in that a step with the thickness of 1-2mm is arranged on the outer wall surface of a gluing part of a male joint and a female joint, then a yarn supplementing material is attached or a yarn supplementing sleeve is sleeved on the step, then electric heating baking/oven baking is carried out on the gluing part, and finally earth supplementing and polishing treatment are carried out on the gluing area until the surface is smooth.

The process of arranging the exposed step and then attaching the yarn supplementing material or sleeving the yarn supplementing sleeve easily enables the manufactured frame to have insufficient integral feeling, stress points exist at the step, the gluing area has the risk of cracking or paint cracking in the using process, and the yarn supplementing material or the yarn supplementing sleeve after yarn supplementing also has two tail ends due to the two tail ends of the step, so that the strength of the glued frame is easily reduced, and the cracking risk exists.

Moreover, the process using the yarn supplementing material or the yarn supplementing sleeve usually needs to perform hard pressing treatment on the gluing area, the glue at the gluing position is easy to extrude to the yarn supplementing material or the yarn supplementing sleeve, so that the glued frame is easy to crack, and in the gluing process using the yarn supplementing sleeve, the yarn supplementing sleeve needs to be additionally manufactured and glued, so that the time cost and the material cost of the process are high.

In addition, after the frame glued by the yarn supplementing material is glued, the gluing area is usually uneven, the gluing surface can be flat only by carrying out multiple times of soil supplementing and polishing treatment, the time consumption is long, and the time and labor cost are high.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a low-cost and high-strength bicycle frame connecting structure, a bicycle frame applying the structure and a gluing process of the bicycle frame connecting structure.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a connecting structure between bicycle pipe fittings comprises a carbon fiber material female joint pipe fitting and a carbon fiber material male joint pipe fitting which are spliced and bonded together through glue, wherein a female joint with an inner wall coated with glue is arranged at one end of the carbon fiber material female joint pipe fitting, a male joint with an outer wall coated with glue and used for being spliced and bonded with the female joint is arranged at one end of the carbon fiber material male joint pipe fitting, a first annular plane, an annular step convex angle with an angle of 270 degrees, a first annular inner side wall surface, an annular inner side wall concave angle with an angle larger than 90 degrees and smaller than 180 degrees, a second annular inner side wall surface, an annular inner side wall convex angle with an angle larger than 180 degrees and smaller than 270 degrees and a third annular inner side wall surface are sequentially arranged on the female joint from outside to inside, and the male joint is sequentially provided with a first annular outer side wall surface matched with the third annular inner side wall surface, an annular outer side wall concave angle matched with the annular inner side wall convex angle, The second annular outer side wall surface is matched with the second annular inner side wall surface, the annular outer side wall convex angle which is matched with the annular inner side wall concave angle and is in a right angle, the third annular outer side wall surface is matched with the first annular inner side wall surface, the annular step concave angle which is matched with the annular step convex angle, and the second annular plane which is matched with the first annular plane.

The diameter phi 1 of the outer wall of the female connector is the same as the diameter phi 2 of the outer wall of the male connector.

The length D1 of the first annular outer side wall surface is greater than the length D2 of the third annular outer side wall surface and the length D3 of the first annular inner side wall surface, respectively.

The length D4 of the first annular plane and the length D5 of the second annular plane are the same and are both 0.3-0.4 mm.

A frame comprises a head pipe fitting, a middle pipe fitting and a lower pipe fitting which are made of carbon fiber materials, wherein a first joint and a second joint are arranged on the head pipe fitting, a third joint connected with the first joint in an inserting mode and a fourth joint connected with the lower pipe fitting are respectively arranged on the middle pipe fitting, two fifth joints are arranged on the rear side of the middle pipe fitting, a sixth joint connected with the second joint through a lower pipe made of carbon fiber materials and a seventh joint connected with the fourth joint in an inserting mode are respectively arranged on the lower pipe fitting, two eighth joints are arranged on the rear side of the lower pipe fitting, a rear fork pipe made of carbon fiber materials is connected between each fifth joint and each eighth joint, a triangular structure is formed among the head pipe fitting, the middle pipe fitting, the lower pipe fitting and the lower pipe fitting, and a single rear fork pipe, the pipe fitting comprises a lower pipe, a rear fork pipe and a plug, wherein two ends of the lower pipe are respectively provided with a first pipe fitting joint, two ends of the rear fork pipe are respectively provided with a second pipe fitting joint, one of the two joints in plug connection is a male joint, the other joint is a female joint, the female joint is sequentially provided with a first annular plane, an annular step convex angle with an angle of 270 degrees, a first annular inner side wall surface, an annular inner side wall concave angle with an angle of more than 90 degrees and less than 180 degrees, a second annular inner side wall surface, an annular inner side wall convex angle with an angle of more than 180 degrees and less than 270 degrees and a third annular inner side wall surface from outside to inside, the male joint is sequentially provided with a first annular outer side wall surface matched with the third annular inner side wall surface, an annular outer side wall concave angle matched with the annular inner side convex angle, a second annular outer side wall surface matched with the second annular inner side wall surface and an annular outer side wall convex angle matched with the annular inner side concave angle, The third annular outer side wall surface is matched with the first annular inner side wall surface, the annular step concave angle is matched with the annular step convex angle, and the second annular plane is matched with the first annular plane.

The head pipe fitting is provided with a vertical through hole, a front fork pipe is connected in the vertical through hole in a penetrating mode, and the lower end of the front fork pipe is provided with a transverse through hole used for enabling a frame formed after each pipe fitting is combined to be installed on the gluing jig.

The back breeches pipe is V type pipe fitting.

The lower ends of the lower pipe fitting and the rear fork pipe are respectively provided with a transverse through hole for mounting a frame formed after the pipe fittings are combined on the gluing jig.

The gluing process applied to the frame is characterized by comprising the following steps of:

1) the method includes manufacturing a frame fitting including the head tube fitting, the middle tube fitting, the lower tube, the front fork tube and the rear fork tube.

2) And reaming the female connectors on the frame fittings, carrying out sand blasting coarsening on the male connectors and the female connectors, cleaning the gluing area, and carrying out weighting and wiping on the pipe fittings before gluing.

3) The outer wall of each male connector on each frame accessory and the inner wall of the female connector are subjected to gluing treatment, then the male connectors and the female connectors are spliced and glued on adjacent frame accessories to form a frame, and then the frame is placed on a jig/jig group and locked to perform heating treatment.

4) And performing glue overflow treatment on the frame, transferring the frame to a semi-finished product bin after QC inspection, and performing soil supplement treatment on the gluing area.

The heating treatment is to bake the gluing area or to transfer the frame and the jig/jig set into the baking box for baking by using the electric heating shell with the electric heating piece inside.

The invention has the beneficial effects that: according to the invention, the female joint is provided with the annular step convex angle, the annular inner side wall concave angle and the annular inner side wall convex angle, and the male joint is provided with the corresponding annular step concave angle, the annular outer side wall convex angle and the annular side wall concave angle, so that the female joint and the male joint form a mutually matched second-order joint, and a yarn supplementing material or a yarn supplementing sleeve does not need to be used for a gluing area, so that the manufactured frame body has good feeling, the thickness of the joint of the two joints is 0.3-0.4mm, the stress is small, and the paint cracking phenomenon is not easy to generate; the glued frame has better strength and is not easy to crack because the glued area has only one tail end; the male connector and the female connector are directly spliced and glued after being glued, and then heating treatment is carried out, so that the working procedures are less, the working hours are shorter, the surface of the pipe fitting in a gluing area is continuous and flat, the working procedures in the later stage are simple, the working hours are reduced, the processing cost is reduced, and the production period of the product is shortened.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic structural view of a connection structure of the present invention;

FIG. 2 is an exploded view of the connection structure of the present invention;

FIG. 3 is a schematic view of the present invention at A;

FIG. 4 is a schematic view of the present invention at B;

FIG. 5 is a schematic representation of the invention at C;

FIG. 6 is a schematic structural view of the vehicle frame of the present invention;

FIG. 7 is an exploded structural view of the vehicle frame of the present invention;

FIG. 8 is a schematic view of the mounting of the carriage and jig of the present invention;

fig. 9 is a prior art schematic of the present invention.

Detailed Description

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" or "a plurality" means two or more unless specifically defined otherwise.

Referring to fig. 1 to 8, a connecting structure between bicycle pipe fittings comprises a carbon fiber material female joint pipe fitting 1 and a carbon fiber material male joint pipe fitting 2 which are spliced and bonded together through glue, wherein a female joint 11 with an inner wall coated with glue is arranged at one end of the carbon fiber material female joint pipe fitting 1, a male joint 21 with an outer wall coated with glue and used for splicing and bonding with the female joint 11 is arranged at one end of the carbon fiber material male joint pipe fitting 2, a first annular plane 12, an annular step convex angle 13 with an angle of 270 degrees, a first annular inner side wall surface 14, an annular inner side wall concave angle 15 with an angle larger than 90 degrees and smaller than 180 degrees, a second annular inner side wall surface 16, an annular inner side wall convex angle 17 with an angle larger than 180 degrees and smaller than 270 degrees and a third annular inner side wall surface 18 are sequentially arranged on the female joint 11, and a first annular outer side wall surface 22 matched with the third annular inner side wall surface 18 is sequentially arranged on the male joint 21, An annular outer side wall reentrant corner 23 which is matched with the annular inner side wall convex corner 17, a second annular outer side wall surface 24 which is matched with the second annular inner side wall 16, an annular outer side wall convex corner 25 which is matched with the annular inner side wall reentrant corner 15 and is in a right angle, a third annular outer side wall surface 26 which is matched with the first annular inner side wall surface 14, an annular step reentrant corner 27 which is matched with the annular step convex corner 13, and a second annular plane 28 which is matched with the first annular plane 12.

The diameter phi 1 of the outer wall of the female joint 11 is the same as the diameter phi 2 of the outer wall of the male joint 21.

The length D1 of the first annular outer side wall surface 22 is greater than the length D2 of the third annular outer side wall surface 26 and the length D3 of the first annular inner side wall surface 14, respectively.

The length D4 of the first annular flat surface 12 and the length D5 of the second annular flat surface 28 are the same and are each 0.3-0.4 mm.

A frame comprises a first pipe fitting 3, a middle pipe fitting 4 and a lower pipe fitting 5, wherein the first pipe fitting 3 is made of carbon fiber materials, a first joint 31 and a second joint 32 are arranged on the first pipe fitting 3, a third joint 41 connected with the first joint 31 in an inserting mode and a fourth joint 42 connected with the lower pipe fitting 5 are arranged on the middle pipe fitting 4 respectively, two fifth joints 43 are arranged on the rear side of the middle pipe fitting 4, a sixth joint 51 connected with the second joint 32 through a lower pipe 6 made of carbon fiber materials and a seventh joint 52 connected with the fourth joint 42 in an inserting mode are arranged on the lower pipe fitting 5 respectively, two eighth joints 53 are arranged on the rear side of the lower pipe fitting 5, a rear fork pipe 7 made of carbon fiber materials is connected between each fifth joint 43 and each eighth joint 53, and the first pipe fitting 3, the middle pipe fitting 4, and a rear fork pipe 7 made of carbon fiber materials are connected between each fifth joint 43 and each eighth joint 53, and each first pipe fitting 4, A triangular structure is formed between the lower pipe fitting 5 and the lower pipe 6, a triangular structure is formed between the middle pipe fitting 4, the lower pipe fitting 5 and the single rear fork pipe 7, the two ends of the lower pipe 6 are respectively provided with a first pipe fitting joint 61, the two ends of the rear fork pipe 7 are respectively provided with a second pipe fitting joint 71, one of the two joints in splicing connection is a male joint 21, the other is a female joint 11, the female joint 11 is sequentially provided with a first annular plane 12, an annular step convex angle 13 with an angle of 270 degrees, a first annular inner side wall surface 14, an annular inner side wall concave angle 15 with an angle of more than 90 degrees and less than 180 degrees, a second annular inner side wall surface 16, an annular inner side wall convex angle 17 with an angle of more than 180 degrees and less than 270 degrees and a third annular inner side wall surface 18 from outside to inside, the male joint 21 is sequentially provided with a first annular outer side wall surface 22, a third annular inner side wall surface 18 and a first annular outer side wall surface, An annular outer side wall reentrant corner 23 which is matched with the annular inner side wall convex corner 17, a second annular outer side wall surface 24 which is matched with the second annular inner side wall 16, an annular outer side wall convex corner 25 which is matched with the annular inner side wall reentrant corner 15 and is in a right angle, a third annular outer side wall surface 26 which is matched with the first annular inner side wall surface 14, an annular step reentrant corner 27 which is matched with the annular step convex corner 13, and a second annular plane 28 which is matched with the first annular plane 12.

The head pipe fitting 3 is provided with a vertical through hole 33, a front fork 8 penetrates through the vertical through hole 33, and a transverse through hole 10 for mounting a frame formed after each pipe fitting is combined on the gluing jig 9 is formed in the lower end of the front fork 8.

The rear fork tube 7 is a V-shaped pipe fitting.

The lower ends of the lower pipe fitting 5 and the rear fork pipe 7 are respectively provided with a transverse through hole 10 for installing a frame formed after the pipe fittings are combined on a gluing jig 9.

The gluing jig 9 comprises a single group or multiple groups of bottom plates spliced together in parallel, the bottom plates are provided with mounting seats for mounting a transverse through hole 10 at the lower end of the front fork tube 8, a transverse through hole 10 at the lower end of the lower tube pipe 5 and a transverse through hole 10 at the lower end of the rear fork tube 7, a connecting piece for connecting the middle tube pipe 4 is arranged on the mounting seat for mounting the lower tube pipe 5, and the middle tube pipe 4 is provided with a vertical insertion hole for mounting the connecting piece.

The gluing process applied to the frame is characterized by comprising the following steps of:

1) manufacturing a frame fitting, wherein the frame fitting comprises the head pipe fitting 3, the middle pipe fitting 4, the lower pipe fitting 5, the lower pipe 6, the front fork pipe 8 and the rear fork pipe 7.

2) And reaming the female connectors on the frame fittings, carrying out sand blasting coarsening on the male connectors and the female connectors, cleaning the gluing area, and carrying out weighting and wiping on the pipe fittings before gluing.

3) The outer wall of each male connector on each frame accessory and the inner wall of the female connector are subjected to gluing treatment, then the male connectors and the female connectors are spliced and glued on adjacent frame accessories to form a frame, and then the frame is placed on a jig/jig group and locked to perform heating treatment.

4) And performing glue overflow treatment on the frame, transferring the frame to a semi-finished product bin after QC inspection, and performing soil supplement treatment on the gluing area.

The heating treatment is to bake the gluing area or to transfer the frame and the jig/jig set into the baking box for baking by using the electric heating shell with the electric heating piece inside.

The heating method using the electric heating shell with the electric heating sheet inside comprises the following steps: the electric heating shell is provided with a quick locking pressure head, and the electric heating shell is directly sleeved outside the gluing area and locked when in use.

According to the invention, the annular step convex angle 13, the annular inner side wall concave angle 15 and the annular inner side wall convex angle 17 are arranged on the female joint 11, the corresponding annular step concave angle 27, the annular outer side wall convex angle 25 and the corresponding annular side wall concave angle 23 are arranged on the male joint 21, so that the female joint 11 and the male joint 21 form a mutually matched second-order joint, a yarn supplementing material or a yarn supplementing sleeve does not need to be used for a gluing area, the manufactured frame is good in body sense, the thickness of the joint of the two joints (namely the first annular plane 12 and the second annular plane 28) is 0.3-0.4mm, the stress is small, and the paint cracking phenomenon is not easy to generate; and the gluing area only has one tail end, so that the frame after gluing has better strength and is not easy to crack, and the paint cracking risk can be reduced by 50 percent; the male connector 21 and the female connector 11 are directly spliced and glued after being glued, and then heating treatment is carried out, so that the working procedures are fewer, the working hours are shorter, the surface of a glued area pipe fitting is continuous and flat, the later working procedures are simple, the working hours are reduced, the processing cost is reduced, and the production period of a product is shortened.

The dimensional tolerance of the inner wall of the female joint 11 is smaller than the machining tolerance, and the size and the performance are more stable.

Referring to fig. 9, fig. 9 is a schematic diagram of a first comparative process, a second comparative process and a third comparative process, and 19 is a yarn supplement material or a yarn supplement sleeve.

The first comparative process comprises the following steps: the first process is the existing process, the first step and the second step are the same as the first step and the second step of the invention, and the rest steps are as follows: gluing the outer wall of each male connector and the inner wall of each female connector on each frame part, splicing and gluing the male connector and the female connector on adjacent frame parts, sticking yarn material on a gluing area, then protecting the edge of the yarn, sleeving a silica gel/aluminum mold/electric heating shell on the gluing area, baking in an electrified way, removing pipe protection after disassembling a baking device, turning to a semi-finished product bin after QC inspection, and performing soil supplement and polishing treatment on the gluing area for multiple times until the surface is smooth.

And (4) a comparison process II: the second process is an improved process, the first step is the same as the first step of the invention, and the rest steps are as follows: reaming female connectors on various frame accessories, manufacturing yarn supplementing sleeves, performing sand blasting coarsening on the male connectors, the female connectors and the yarn supplementing sleeves, cleaning a gluing area, balancing weight of the pipe fittings and wiping before gluing; gluing the outer wall of each male connector and the inner wall of each female connector on each frame part, gluing the male connectors, the female connectors and the yarn supplementing sleeves on the adjacent frame parts to form a frame, placing the frame on a jig/jig group and locking, sleeving an aluminum mold/electric heating shell on a gluing area, baking in an electrified mode, removing pipe protection after disassembling a baking device, turning to a semi-finished product bin after QC inspection, and performing soil supplementing and polishing treatment on the gluing area.

And (3) a third comparison process: the third process is an improved process, the first step is the same as the first step of the invention, and the rest steps are as follows: reaming female connectors on various frame accessories, manufacturing yarn supplementing sleeves, performing sand blasting coarsening on the male connectors, the female connectors and the yarn supplementing sleeves, cleaning a gluing area, balancing weight of the pipe fittings and wiping before gluing; the outer wall of each male joint on each frame accessory and the inner wall of female joint carry out the rubber coating and handle, then carry out the veneer of male joint, female joint, benefit yarn sheathed tube to adjacent frame accessory, make up into the frame, then place the frame and go up tool/tool group and lock, shift into to toast the incasement and toast, take off from toasting the incasement after accomplishing, change into semi-manufactured goods storehouse after QC inspection, carry out the benefit soil and polish the processing to gluing region.

The gluing hours of the invention compared to the three sets of comparative processes are shown in the following table:

according to the data in the table, the gluing time is the shortest, the first comparison process uses the yarn supplementing material, the second comparison process uses the yarn supplementing sleeve, the yarn supplementing material is heated by the electric heating shell, the gluing area is easy to clamp yarn and crack, the surface of the treated gluing area is not smooth enough, and the gluing area needs to be repeatedly supplemented with soil and polished at the later stage, so that the gluing area is easy to be unstable. Compared with other processes, the first process has the advantages that the gluing process of a single male-female joint is complex, and each frame is provided with a plurality of male-female joints, so that the time cost for gluing all the male-female joints is high.

Compared with the process of the invention, the second and third comparison processes have the advantages that the manufacturing process of the yarn supplementing sleeve is increased, the cost is high, and the glued frame has two tail ends regardless of the yarn supplementing material or the yarn supplementing sleeve, so that the strength of the glued frame is easily reduced, and the cracking risk is caused. Compared with the second comparison process and the third comparison process, the heating modes of the two processes are different, and the second comparison process needs to assemble the electric heating shell for each male connector and each female connector, so that the time needed by the second comparison process is longer compared with the process that the whole frame of the third comparison process is moved into an oven to be baked. In addition, because the male and female connectors and the yarn supplementing sleeve need to be glued before splicing and gluing, the length of the male and female connectors used in the second comparison process and the third comparison process, which need to be glued, is 20mm, and the length of the yarn supplementing sleeve, which need to be glued, is 30mm, namely the length of the glue needed for gluing each male and female connector is 50 mm.

The process only needs to glue the male and female connectors respectively and then perform splicing and gluing, does not need to use a yarn supplementing material or a yarn supplementing sleeve, has simple gluing process and post-treatment process, consumes less time, and reduces labor and time cost. And the second-order male joint and female joint only have one end after splicing and gluing, so that the strength is good, the joint is not easy to crack, and the paint cracking risk can be reduced by 50%.

The above embodiments do not limit the scope of the present invention, and those skilled in the art can make equivalent modifications and variations without departing from the overall concept of the present invention.