Workpiece connecting device and pipe bending die

Abstract

The utility model provides a work piece connecting device and bend pipe mould relates to machining tool technical field, including first work piece and second work piece, the back side face of work face of first work piece is equipped with the inverted L-shaped fixture block, the second work piece is equipped with the inverted L-shaped holding groove, the inverted L-shaped holding groove and the inverted L-shaped fixture block are matched in size, and the inverted L-shaped fixture block is equipped with the inverted L-shaped holding groove. The end of the inverted-L-shaped containing groove is provided with a sliding-in opening allowing the inverted-L-shaped clamping block to slide in, a threaded hole allowing a bolt to be screwed in is formed in the second workpiece, the threaded hole is communicated with the L-shaped containing groove, the pipe bending mold comprises a guide mold, a clamping mold, a clamping mold switching block, a guide mold switching block, a wheel mold and a pipe bending machine, and the pipe bending machine further comprises a workpiece connecting device, and the guide mold and the clamping mold are both the first workpiece. The inverted-L-shaped clamping blocks are located on the guide die and the clamping die, the guide die adapter block and the clamping die adapter block are both second workpieces, the inverted-L-shaped containing grooves are located on the guide die adapter block and the clamping die adapter block, rapid disassembly and assembly of the die can be achieved, the die replacement operation is simple, the die replacement time is short, and the production efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing tools, in particular to a workpiece connecting device and a pipe bending die. Background Art

[0002] In recent years, electric vehicles have become one of the important means of transportation for people to travel in an environmentally friendly way because of their lightness, speed and energy saving. The frame of an electric bicycle is the supporting and fixing part of the entire vehicle, and is also an important part that connects and carries other parts. It is welded together by multiple pipes and multiple sheet metal parts. A large number of pipe bending dies are used in the processing of pipes. Different pipe bending dies need to be replaced when producing different pipe materials or different models.

[0003] The pipe bending mold is usually composed of a wheel mold, a guide mold, a clamping mold, an adapter block, a core rod, etc. The guide mold and the adapter block, the clamping mold and the adapter block in the existing pipe bending mold are installed by plugging, and bolts are directly passed through the mold and the adapter block, and the mold is fixed on the adapter block by bolts, and the adapter block is then installed on the pipe bending machine through a keyway. A pipe bending machine connecting hole is provided on the back of the adapter block, and the adapter block and the pipe bending machine are fixed by bolts passing through the pipe bending machine connecting hole from the back. When removing and replacing the guide mold, the bolts between the adapter block and the pipe bending machine are first loosened, and the connecting key and the screws of the pipe bending machine need to be loosened first, and the adapter block and the guide mold are taken out upward together, and then the fixing screws of the adapter block and the guide mold are removed before the guide mold can be taken out. The removal time is long, and a lot of time is required to adjust the position of the guide mold and the clamping mold during installation to ensure that the mounting holes on the guide mold and the clamping mold 2 are accurately aligned with the threaded holes on the adapter block. The installation process is complicated and the mold change time is long, which affects the production efficiency.

[0004] Patent document CN219025626U discloses a mold that makes it easier to replace a pipe bending fixture. The fixed fixture (guide die) has a first plug plate on the side close to the fixed fixture base (adapter block), and the fixed fixture base has a first slot on the side close to the fixed fixture. The fixed fixture and the fixed fixture base are connected by screws passing through the first plug plate and the first slot, and the forming fixture (clamp die) and the forming fixture base (adapter block) are connected by screws passing through the second plug plate and the second slot. The fixed fixture base and the forming fixture base are connected to the pipe bending machine and need to be fastened by bolts. When installing the mold, a lot of time is needed to adjust the position of the base and the fixture to ensure that the mounting holes on the guide die and the clamp die are accurately aligned with the threaded holes on the adapter block. The mold change time is long, which affects production efficiency. Utility Model Content

[0005] The purpose of the utility model is to provide a workpiece connection device and a pipe bending mold to solve the problems existing in the above-mentioned prior art. The inverted L-shaped block of the mold is limited in the lateral position and the vertical position by the inverted L-shaped receiving groove of the adapter block to complete the preliminary installation of the guide mold and the clamping mold on their respective adapter blocks, and the bolts are pressed from the threaded holes to abut the inverted L-shaped blocks on the clamping mold and the guide mold, and the guide mold and the clamping mold are firmly fixed on the adapter block to complete the installation of the guide mold and the clamping mold on the adapter block. When disassembling, it is only necessary to detach the bolts from the surfaces of the inverted L-shaped blocks on the guide mold and the clamping mold, and take out the inverted L-shaped blocks from the inverted L-shaped receiving groove to realize the removal of the guide mold and the clamping mold, so as to realize the rapid disassembly and assembly of the mold, the mold changing operation is simple, the mold changing time is short, and the production efficiency is high.

[0006] To achieve the above-mentioned purpose, the utility model provides the following solution: a workpiece connecting device is provided, including a first workpiece and a second workpiece, the back side surface of the working surface of the first workpiece is provided with an inverted L-shaped clamping block, the second workpiece is provided with an inverted L-shaped receiving groove, the inverted L-shaped receiving groove and the inverted L-shaped clamping block match in size, the end of the inverted L-shaped receiving groove has a sliding entrance for the inverted L-shaped clamping block to slide into, and the second workpiece is provided with a threaded hole for a bolt to be screwed into, and the threaded hole is connected to the L-shaped receiving groove.

[0007] Preferably, the second workpiece includes a concave-shaped workpiece body and a limiting protrusion, the limiting protrusion is located at the end of the inner concave part of the workpiece body, and the inverted L-shaped receiving groove is formed between the limiting protrusion and the workpiece body.

[0008] Preferably, the inverted L-shaped receiving groove comprises a transverse groove and a vertical groove connected vertically, and the threaded hole is aligned with the plane where the transverse groove or the vertical groove is located.

[0009] Preferably, the threaded hole is located above the transverse groove, and the threaded hole is perpendicular to the transverse groove.

[0010] Preferably, the inverted L-shaped block includes a horizontal plate and a vertical plate which are respectively slidably matched with the horizontal groove and the vertical groove, and chamfers are provided at the inner corners of the horizontal plate and the vertical plate, and chamfers are also provided at the matching parts of the limiting protrusion and the inner corner of the inverted L-shaped block.

[0011] A pipe bending mold is provided, comprising a guide mold, a clamping mold, a clamping mold adapter block, a guide mold adapter block, a wheel mold and a pipe bending machine, which also includes the above-mentioned workpiece connecting device, the guide mold and the clamping mold are both the first workpiece, the inverted L-shaped clamping block is located on the guide mold and the clamping mold, the guide mold adapter block and the clamping mold adapter block are both the second workpiece, and the inverted L-shaped receiving groove is located on the guide mold adapter block and the clamping mold adapter block.

[0012] Preferably, arc grooves are provided on the working surfaces of the guide die and the clamping die, and the arc grooves match the size of the pipe to be processed.

[0013] Preferably, keyways are provided on the end faces of the guide die adapter block and the clamp die adapter block facing away from the inverted L-shaped receiving groove, and the keyways are connected to the pipe bending machine.

[0014] Preferably, the threaded hole and the keyway are vertically arranged, and the keyway is parallel to the threaded hole.

[0015] Preferably, the guide mold and the guide mold block are an integrally formed structure, and the clamping mold and the clamping mold block are also an integrally formed structure.

[0016] Compared with the prior art, the utility model has achieved the following technical effects:

[0017] 1. In the workpiece connecting device of the present invention, the inverted L-shaped block of the first workpiece slides directly into the inverted L-shaped receiving groove from the sliding entrance of the inverted L-shaped receiving groove of the second workpiece, limits the relative lateral position and vertical position of the first workpiece and the second workpiece, and completes the preliminary installation of the first workpiece and the second workpiece. Thereafter, the bolt is screwed into the threaded hole so that the bolt presses the inverted L-shaped block to abut against it, and limits the axial position of the inverted L-shaped block, thereby completing the installation of the first workpiece and the second workpiece. When dismantling, it is only necessary to loosen the bolt and then slide the inverted L-shaped block out of the inverted L-shaped receiving groove to complete the disassembly of the first workpiece and the second workpiece. The installation and disassembly process of the workpieces is simple and convenient, and can realize rapid disassembly and assembly of the workpieces. The operation process of workpiece replacement is simple, the time required is short, and the work efficiency is high.

[0018] 2. In the pipe bending mold of the utility model, the inverted L-shaped blocks on the guide mold and the clamping mold are slid and inserted into the corresponding inverted L-shaped receiving grooves, and the lateral position and vertical position of the inverted L-shaped blocks are limited by the inner wall of the inverted L-shaped receiving grooves, so as to complete the preliminary installation of the guide mold and the clamping mold on their respective adapter blocks, and the lateral position and vertical position of the guide mold and the clamping mold are limited, which can effectively ensure that the guide mold and the clamping mold have a suitable distance to the center of the wheel mold, and then the bolts are pressed from the threaded holes to abut the inverted L-shaped blocks on the clamping mold and the guide mold. The guide mold and the clamping mold are firmly fixed on the adapter block to complete the installation of the guide mold and the clamping mold on the adapter block. When disassembling, first loosen the bolts to make the bolts detach from the surface of the inverted L-shaped blocks on the guide mold and the clamping mold, and then remove the inverted L-shaped blocks from the inverted L-shaped receiving grooves to realize the removal of the guide mold and the clamping mold. In addition, the mold (guide mold and clamping mold) can be quickly disassembled and assembled, and the mold changing operation is simple, the mold changing time is short, and the production efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the prior art;

[0021] Figure 2 It is a front view schematic diagram of the overall structure of the prior art;

[0022] Figure 3 This is a schematic diagram of the overall device of the utility model;

[0023] Figure 4 This is a schematic diagram of the overall device of the utility model from another perspective;

[0024] Figure 5 This is a schematic diagram of the guide die and clamping die structure of the utility model;

[0025] Figure 6 It is a rear view schematic diagram of the guide die and clamping die of the utility model;

[0026] Figure 7 It is a schematic diagram of the guide die adapter block and the clamp die adapter block of the utility model.

[0027] Among them, 1. guide die; 2. clamping die; 3. guide die adapter block; 4. clamping die adapter block; 5. threaded hole; 6. keyway; 7. arc groove; 8. wheel die; 9. adapter block; 11. guide die clamp block; 21. clamping die clamp block; 31. adapter block body; 32. limiting protrusion; 91. pipe bending machine connecting hole. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0030] Example 1

[0031] This embodiment provides a workpiece connection device, please refer to Figures 1 to 7As shown, it includes a first workpiece and a second workpiece, the back side surface of the working surface of the first workpiece is provided with an inverted L-shaped clamping block, and the second workpiece is provided with an inverted L-shaped receiving groove. The sizes of the inverted L-shaped receiving groove and the inverted L-shaped clamping block match each other. When the inverted L-shaped clamping block slides into the inverted L-shaped receiving groove, the inverted L-shaped clamping block is completely fitted with the inverted L-shaped receiving groove. The end of the inverted L-shaped receiving groove has a sliding entrance for the inverted L-shaped clamping block to slide into. The second workpiece is provided with a threaded hole 5 for a bolt to be screwed into. The threaded hole 5 is connected to the inverted L-shaped receiving groove. After the bolt is screwed into the threaded hole 5, it directly abuts against the inverted L-shaped clamping block.

[0032] Working principle: the inverted L-shaped clamping block of the first workpiece slides directly into the inverted L-shaped receiving groove from the sliding entrance of the inverted L-shaped receiving groove of the second workpiece, so that the first workpiece and the second workpiece are clamped together, and the relative lateral and vertical positions of the first workpiece and the second workpiece are limited by the cooperation of the inverted L-shaped clamping block and the inverted L-shaped receiving groove, so as to complete the preliminary installation of the first workpiece and the second workpiece, and then the bolt is screwed into the threaded hole 5 so that the bolt abuts against the inverted L-shaped clamping block and is tightened to limit the axial position of the inverted L-shaped clamping block and prevent the inverted L-shaped clamping block from sliding along the inverted L-shaped receiving groove, thereby completing the installation of the first workpiece and the second workpiece.

[0033] When removing, just loosen the bolts to make them separate from the inverted L-shaped block, and then slide the inverted L-shaped block out of the inverted L-shaped slot to complete the removal of the first workpiece from the second workpiece. The installation and removal process of the workpiece is simple and convenient, and the workpiece can be quickly installed and removed. The operation process of workpiece replacement is simple, the time required is short, and the work efficiency is high.

[0034] In one embodiment, the second workpiece includes a workpiece body and a limiting protrusion 32, and the workpiece body is in a concave structure. The limiting protrusion 32 is connected to the end of the inner concave part of the workpiece body, preferably in an integrally formed manner. An inverted L-shaped receiving groove is formed between the limiting protrusion 32 and the workpiece body. When the inverted L-shaped clamping block of the first workpiece slides into the inverted L-shaped receiving groove, the limiting protrusion 32 and the opposite side of the workpiece body jointly abut the inverted L-shaped clamping block to achieve lateral limitation.

[0035] In this embodiment, the inverted L-shaped mounting groove includes a vertically connected horizontal groove and a vertical groove, and the threaded hole 5 is aligned with the plane where the horizontal groove or the vertical groove is located. Preferably, the threaded hole 5 is directly perpendicular to the plane where the horizontal groove or the vertical groove is located, so that the bolt can directly abut the main plate surface of the inverted L-shaped block, rather than the two bottom surfaces of the inverted L-shaped block, to ensure that the bolt can stably act on the main body of the inverted L-shaped block and limit it.

[0036] In this embodiment, the inverted L-shaped block includes a horizontal plate and a vertical plate that slide with the horizontal groove and the vertical groove respectively. The inner corners of the horizontal plate and the vertical plate are chamfered, and the matching part between the limiting protrusion 32 and the inner corner of the inverted L-shaped block is also chamfered.

[0037] Example 2

[0038] This embodiment provides a pipe bending die, such as Figures 1 to 7 As shown, it includes a guide die 1, a clamp die 2, a clamp die adapter block 4, a guide die adapter block 3, a wheel die 8 and a pipe bending machine. The matching relationship between the above-mentioned multiple pipe bending die components belongs to the prior art and will not be repeated here. The pipe bending die also includes the workpiece connecting device in Example 1. The guide die 1 and the clamp die 2 are both first workpieces. Inverted L-shaped clamping blocks are provided on the side of the guide die 1 and the clamp die 2 away from the working surface. The guide die adapter block 3 and the clamp die adapter block 4 are both second workpieces, and the inverted L-shaped receiving grooves are located on the guide die adapter block 3 and the clamp die adapter block 4.

[0039] The guide die adapter block 3 and the clamp die adapter block 4 both include an adapter block body 31 (i.e., a workpiece body) and a limiting protrusion 32. An inverted L-shaped receiving groove is formed between the adapter block body 31 and the limiting protrusion 32. The inverted L-shaped clamping blocks on the guide die 1 and the clamp die 2 can slide into the inverted L-shaped receiving grooves on the guide die adapter block 3 and the clamp die adapter block 4, respectively. When the inverted L-shaped clamping block of the guide die 1 or the clamp die 2 slides into the inverted L-shaped receiving groove, the limiting protrusion 32 and the opposite side of the adapter block body 31 jointly abut against the inverted L-shaped clamping block to achieve lateral limiting. Threaded holes 5 are provided in the guide die adapter block 3 and the clamp die adapter block 4. The threaded holes 5 are connected to the inverted L-shaped receiving groove, and the bolts pass through the threaded holes 5 to axially limit the inverted L-shaped clamping block.

[0040] Working principle: During installation, slide the inverted L-shaped block on the guide mold 1 into the inverted L-shaped receiving groove on the guide mold adapter block 3, and the outer wall of the inverted L-shaped block fits with the inner wall of the inverted L-shaped receiving groove. The lateral position and vertical position of the inverted L-shaped block are limited by the inner wall of the inverted L-shaped receiving groove, thereby effectively preventing the lateral shaking of the guide mold 1, and slide the inverted L-shaped block on the clamping mold 2 into the inverted L-shaped receiving groove on the clamping mold adapter block 4, so that the clamping mold 2 is stably installed on the clamping mold adapter block 4. In this way, the preliminary installation of the guide mold 1 and the clamping mold 2 on their respective adapter blocks is completed, and the lateral position and vertical position of the guide mold 1 and the clamping mold 2 are limited, which can also effectively ensure the guide mold 1 and the clamping die 2 have a suitable distance to the center of the wheel die 8 to ensure effective clamping of the pipe material, and then the bolt is screwed from the threaded hole 5 into the guide die adapter block 3 and the clamping die adapter block 4, one end of the bolt directly abuts against the inverted L-shaped block on the clamping die 2 and the guide die 1, and presses it, thereby preventing the guide die 1 and the clamping die 2 from axially moving along the inverted L-shaped mounting groove, and firmly fixing the guide die 1 and the clamping die 2 on the adapter block to complete the installation of the guide die 1 and the clamping die 2 on the adapter block, and completing the installation of the adapter block. Through the cooperation of the pipe bending machine, the clamping die 2, the guide die 1 and the wheel die 8, the bending processing of the pipe fitting is completed. The overall installation process is simple and fast, and no mounting holes are required on the guide die 1 and the clamping die 2.

[0041] When disassembling, first loosen the bolts. The bolts do not need to be completely unscrewed. Make the bolts separate from the surfaces of the inverted L-shaped blocks on the guide mold 1 and the clamping mold 2, and then take the inverted L-shaped blocks out of the inverted L-shaped receiving grooves to achieve the removal of the guide mold 1 and the clamping mold 2.

[0042] When changing molds, the utility model only needs to loosen the bolts, and the screws do not need to be completely screwed out to complete the mold change, and there is no need to disassemble the adapter block; after the mold is changed, the guide mold 1 and the clamping mold 2 do not need to be adjusted and can be used, the mold change is completed quickly, the mold change operation is simple, the mold change time is short, and the production efficiency is high. The mold (guide mold 1 and clamping mold 2) can be quickly disassembled and assembled, the mold change operation is simple, the mold change time is short, and the production efficiency is high.

[0043] In one embodiment, the inverted L-shaped block provided on the guide mold 1 is the guide mold block 11, and the inverted L-shaped block provided on the clamping mold 2 is the clamping mold block 21. An arc groove 7 is provided on the working surfaces of the guide mold 1 and the clamping mold 2. The size of the arc groove 7 matches the size of the pipe to be processed, and the pipe to be processed is clamped through the arc groove 7.

[0044] In one embodiment, a keyway 6 is provided on the end surface of the guide die adapter block 3 and the clamp die adapter block 4 which are away from the inverted L-shaped receiving groove, and the keyway 6 is used to directly connect the guide die adapter block 3 and the clamp die adapter block 4 to the pipe bending machine.

[0045] In this embodiment, the threaded hole 5 and the keyway 6 are both arranged vertically, and the threaded hole 5 is preferably located above the inverted L-shaped receiving groove, and the keyway 6 and the threaded hole 5 are arranged parallel to each other.

[0046] In one embodiment, the guide mold 1 and the guide mold 1 block are an integrally formed structure, and the clamping mold 2 and the clamping mold 2 block are also an integrally formed structure, which can also be connected by welding.

[0047] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numerals in the claims should not be regarded as limiting the claims involved.

[0048] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A workpiece connecting device, comprising a first workpiece and a second workpiece, characterized in that: An inverted L-shaped block is arranged on the back side of the working surface of the first workpiece, and an inverted L-shaped receiving groove is arranged on the second workpiece. The sizes of the inverted L-shaped receiving groove and the inverted L-shaped block match, and the end of the inverted L-shaped receiving groove has a sliding entrance for the inverted L-shaped block to slide into. A threaded hole for a bolt to be screwed into is arranged on the second workpiece, and the threaded hole is connected to the L-shaped receiving groove.

2. The workpiece connecting device according to claim 1, characterized in that: The second workpiece includes a concave workpiece body and a limiting protrusion, wherein the limiting protrusion is located at the end of the inner concave part of the workpiece body, and the inverted L-shaped receiving groove is formed between the limiting protrusion and the workpiece body.

3. The workpiece connecting device according to claim 2, characterized in that: The inverted L-shaped receiving groove includes a transverse groove and a vertical groove connected vertically, and the threaded hole is aligned with the plane where the transverse groove or the vertical groove is located.

4. The workpiece connecting device according to claim 3, characterized in that: The threaded hole is located above the transverse groove, and the threaded hole is perpendicular to the transverse groove.

5. The workpiece connecting device according to claim 3, characterized in that: The inverted L-shaped block includes a horizontal plate and a vertical plate which are respectively slidably matched with the horizontal groove and the vertical groove. The inner corners of the horizontal plate and the vertical plate are chamfered, and the matching part between the limiting protrusion and the inner corner of the inverted L-shaped block is also chamfered.

6. A pipe bending die, comprising a guide die, a clamping die, a clamping die adapter block, a guide die adapter block, a wheel die and a pipe bending machine, characterized in that: It also includes the workpiece connecting device as described in any one of claims 1 to 5, wherein the guide die and the clamp die are both the first workpiece, the inverted L-shaped block is located on the guide die and the clamp die, the guide die adapter block and the clamp die adapter block are both the second workpiece, and the inverted L-shaped receiving groove is located on the guide die adapter block and the clamp die adapter block.

7. The pipe bending die according to claim 6, characterized in that: Arc grooves are arranged on the working surfaces of the guide die and the clamping die, and the arc grooves match the size of the pipe to be processed.

8. The pipe bending die according to claim 6, characterized in that: The end surfaces of the guide die adapter block and the clamp die adapter block facing away from the inverted L-shaped receiving groove are provided with key grooves, and the key grooves are connected to the pipe bending machine.

9. The pipe bending die according to claim 8, characterized in that: The threaded hole and the key slot are vertically arranged, and the key slot is parallel to the threaded hole.

10. The pipe bending die according to claim 6, characterized in that: The guide mold and the guide mold block are an integrally formed structure, and the clamping mold and the clamping mold block are also an integrally formed structure.

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