A bending fixture

Abstract

This application relates to the field of material processing technology, and particularly to a bending fixture for bending raw materials at a preset bending position, wherein a fixed part and a rotating part are located on both sides of the bending position. The bending fixture includes a base, a positioning mechanism, a bending mechanism, and a limiting block. The base includes a chassis, a working plate, a support column, and a fine-tuning ring. A cylindrical and vertically arranged support column is connected between the horizontal chassis and the working plate, and the surface of the working plate has a working scale indicating the bending angle. The fine-tuning ring is rotatably sleeved on the support column, and a fine-tuning scale is provided at the upper edge of its outer surface. The positioning mechanism is installed on the upper side of the working plate to position and fix the fixed part of the raw material. The bending mechanism is rotatably connected to the support column, passes through the working plate, and pushes the rotating part of the raw material to rotate around the bending position. A fine-tuning pointer is provided near the fine-tuning scale of the bending mechanism. The limiting block is installed on the chassis and cooperates with the bending mechanism to prevent the rotation of the bending mechanism.

Description

Technical Field

[0001] This utility model relates to the field of material processing technology, and in particular to a bending fixture. Background Technology

[0002] When processing multiple raw materials, it is often necessary to bend various pipes or bars as raw materials. When bending a small amount of raw materials, small manual bending fixtures are more practical than large bending machines, as they have advantages such as low cost, small size, easy mobility, and quick and convenient operation.

[0003] To ensure that the bending degree of raw materials meets actual requirements, bending fixtures are usually equipped with scales indicating the bending angle. Because the raw materials themselves are elastic, they will spring back after bending. Therefore, it is necessary to measure the actual bending angle and then perform a second bend to compensate. However, it is difficult to accurately determine the compensation amount during the second bend, resulting in lower accuracy of the product's bending angle. Utility Model Content

[0004] The purpose of this utility model is to provide a bending fixture with high accuracy in bending angle.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A bending fixture is used to bend a raw material to be bent at a preset bending position, wherein the bending position of the raw material has a fixed part and a rotating part on both sides, and the bending fixture includes:

[0007] The base includes a chassis, a working plate, a support column, and a fine-tuning ring. The support column, which is vertically arranged and cylindrical in shape, is supported between the horizontally arranged chassis and the working plate. The working plate has a circumferential hole extending around the support column, and a working scale is provided on the edge of the working plate away from the support column along the circumferential hole. The chassis has a limiting elongated hole extending around the support column. The fine-tuning ring is sleeved on the support column and is controllably rotatably connected to the support column. A fine-tuning scale is provided on the outer surface of the fine-tuning ring near the edge of the working plate.

[0008] A positioning mechanism is installed on the side of the working plate away from the chassis, for positioning both ends of the fixing part of the raw material and fixing the fixing part of the raw material;

[0009] The bending mechanism includes a rotating seat rotatably connected to the support column, a long strip-shaped rotating wrench connected to the outer surface of the rotating seat, and a pusher for pushing the rotating part of the raw material to rotate around the bending position. The position of the pusher is matched with the surrounding hole. The rotating seat is sleeved on the support column and has a fine adjustment pointer on its surface adjacent to the fine adjustment scale.

[0010] The limiting block is fastened to any position of the limiting elongated hole and its structure is matched with the bending mechanism to prevent the rotation of the rotating seat.

[0011] Optionally, the pusher is configured as a horizontally arranged roller rotatably connected to the rotary wrench.

[0012] Optionally, the positioning mechanism includes a bending abutment, a length scale, a positioning block, and a pressure block. The bending abutment has an abutment surface extending in a first direction and a bent end for abutting the bending position of the raw material. The length scale extends in the first direction and is partially adjacent to the abutment surface of the bending abutment. The pressure block is controllably close to or away from the abutment surface of the bending abutment for clamping or releasing the raw material. The positioning block covers a portion of the length scale and abuts the end of the fixing portion of the raw material away from the bending position.

[0013] Optionally, the surface of the fine-tuning ring is connected to a fastening bolt, which rotates away from or against the surface of the support column.

[0014] Optionally, the positioning block is fastened to any position on the elongated hole extending along the first direction on the working disk.

[0015] Optionally, the positioning mechanism further includes a clamping assembly, which includes a pressure rod, and the pressure block is controllably moved closer to or away from the bending contact member as the pressure rod rotates.

[0016] Optionally, the positioning mechanism further includes a guide rail, which is arranged perpendicular to the first direction, and the pressure block is slidably connected to the guide rail.

[0017] Optionally, the guide rail is fastened to any position on the working disc via an elongated hole extending along its extension direction.

[0018] Optionally, the pusher is fastened to any position on the elongated hole extending along the extension direction of the rotating wrench.

[0019] Optionally, the bent end of the bending contact member is provided with an inner protective groove, and the pushing member is provided with an outer protective groove at the position where it cooperates with the inner protective groove.

[0020] The beneficial effects of this invention are as follows: When the raw material is fixed on the working disc and the rotating wrench is pushed to bend it, the endpoint position of the rotating wrench is controlled according to the working scale and marked by a limit block. A high-precision angle measurement is performed on the bent raw material, and a compensation value is derived based on the difference between the detected value and the preset value. Rotating the fine-tuning ring allows the fine-tuning pointer to point to any mark within the fine-tuning scale, and the position of the limit block is adjusted according to the compensation value, thereby ensuring high accuracy in the bending angle of subsequent bending operations.

[0021] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the bending fixture shown in Embodiment 1 of this utility model;

[0023] Figure 2 This is a structural schematic diagram of the bending fixture shown in Embodiment 1 of this utility model from another angle.

[0024] Legend: 1-Base, 11-Chassis, 111-Limiting elongated hole, 12-Working disc, 121-Circumferential hole, 122-Working scale, 13-Support column, 14-Fine adjustment ring, 141-Fine adjustment scale, 15-Extension plate, 2-Positioning mechanism, 21-Bending contact part, 211-Contact surface, 212-Bending end, 213-Inner protective groove, 22-Length scale, 23-Positioning block, 24-Pressure block, 25-Guide rail, 26-Pressure assembly, 261-Pressure rod, 3-Bending mechanism, 31-Rotating seat, 311-Fine adjustment pointer, 32-Rotating wrench, 33-Adjustable connector, 331-Rotating shaft, 34-Pushing part, 341-Outer protective groove, 35-Limiting pin, 4-Limiting block. Detailed Implementation

[0025] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0029] The bending fixture claimed in this utility model application is used to bend raw materials at a preset bending position. The bending position of the raw material has a fixed part and a rotating part on both sides, respectively. The bending fixture includes a base 1, a positioning mechanism 2, a bending mechanism 3, and a limiting block 4. The base 1 includes a chassis 11, a working disc 12, a support column 13, and a fine-tuning ring 14. The vertically arranged and cylindrical support column 13 is supported between the horizontally arranged chassis 11 and the working disc 12. The working disc 12 has a circumferential hole 121 extending around the support column 13, and a working scale 122 is provided on the edge of the working disc 12 along the circumferential hole 121 away from the support column 13. The chassis 11 has a limiting elongated hole 111 extending around the support column 13. A fine-tuning ring 14 is fitted onto and controllably rotatably connected to the support column 13. A fine-tuning scale 141 is provided on the outer surface of the fine-tuning ring 14 near the edge of the working disc 12. A positioning mechanism 2 is installed on the side of the working disc 12 away from the base 11, used to position the two ends of the fixing part of the raw material and fix the fixing part of the raw material. The bending mechanism 3 includes a rotating seat 31 rotatably connected to the support column 13, a long strip-shaped rotating wrench 32 connected to the outer surface of the rotating seat 31, and a pushing member 34 for pushing the rotating part of the raw material to rotate around the bending position. The position of the pushing member 34 matches the surrounding hole 121. The rotating seat 31 is fitted onto the support column 13 and has a fine-tuning pointer 311 on its surface near the fine-tuning scale 141. A limiting block 4 is fastened to any position of the limiting elongated hole 111 and its structure matches the bending mechanism 3, used to prevent the rotation of the rotating seat 31.

[0030] When the raw material is fixed on the work plate 12 and the rotary wrench 32 is pushed to bend it, the end position of the rotary wrench 32 is controlled according to the working scale 122 and marked by the limit block 4. A high-precision angle measurement is performed on the bent raw material, and a compensation value is calculated based on the difference between the measured value and the preset value. The fine-tuning ring 14 is rotated so that the fine-tuning pointer 311 points to any mark within the fine-tuning scale 141. The position of the limit block 4 is adjusted according to the compensation value, thereby ensuring high accuracy in the bending angle of subsequent bending operations.

[0031] Please refer to the following examples for details.

[0032] Example 1:

[0033] Please see Figure 1 and Figure 2 The bending fixture shown in a preferred embodiment of this application includes a base 1, a positioning mechanism 2, a bending mechanism 3, and a limiting block 4. The positioning mechanism 2, the bending mechanism 3, and the limiting block 4 are all mounted on the base 1.

[0034] The base 1 includes a chassis 11, a working disc 12, a support column 13, and a fine-tuning ring 14. The cylindrical support column 13 is vertically positioned, while the rectangular chassis 11 and working disc 12 are horizontally positioned and connected to both ends of the support column 13. The surface area of ​​the chassis 11 is smaller than that of the working disc 12. An arc-shaped surrounding hole 121, coaxial with the support column 13, is formed on the working disc 12. The outer edge of the surrounding hole 121, away from the support column 13, is the outer edge, and the opposite side is the inner edge. Working graduations 122 are arranged on the outer edge of the surrounding hole 121. An arc-shaped limiting elongated hole 111, coaxial with the support column 13, is provided on the chassis 11. The annular fine-tuning ring 14 is fitted onto the outside of the support column 13 and rotatably connected to it. A fastening bolt passes through the fine-tuning ring 14, and by rotating it away from or against the surface of the support column 13, the fine-tuning ring 14 can be locked or rotated freely. Fine adjustment scale 141 is provided on the outer surface of the fine adjustment ring 14 near one edge of the working disk 12.

[0035] The positioning mechanism 2 includes a bent abutment 21, a length scale 22, a positioning block 23, a pressure block 24, a guide rail 25, and a clamping assembly 26. The bent abutment 21 is generally trapezoidal in shape, with the longer base forming the abutment surface 211 along a first direction. The end of the abutment surface 211 along the first direction is a bent end 212, located near the center of the inner edge of the surrounding hole 121. The length scale 22 is formed on the surface of the working disc 12 away from the base 11 and extends along the first direction. Part of its scale is adjacent to the abutment surface 211 of the bent abutment 21, and its starting position corresponds to the bent end 212 of the bent abutment 21. The rectangular positioning block 23 is positioned along the first direction, away from the bent abutment 21, and covers part of the length scale 22. An elongated hole extending along the first direction is formed on the working disc 12 corresponding to the position of the positioning block 23. The middle part of the positioning block 23 is fastened to the elongated hole by a set of fastening bolts, which facilitates the adjustment of the position of the positioning block 23 in the first direction. A rectangular strip-shaped pressure block 24 is arranged along a second direction perpendicular to the first direction and is positioned corresponding to the middle of the bending contact member 21. A guide rail 25 is arranged on its side along the second direction. The guide rail 25 is also fastened to the working disc 12 through the elongated hole and fastening bolts, so that the position of the guide rail 25 in the second direction is adjustable, which helps to ensure that the pressure block 24 does not derail. The pressure block 24 is slidably connected to the guide rail 25, so that the pressure block 24 can slide in the second direction. A pressing assembly 26 is arranged along the second direction on the side of the pressure block 24 away from the bending contact member 21 and is connected to the end of the pressure block 24 away from the bending contact member 21. The pressing assembly 26 includes a pressing rod 261, and the rotation of the pressing rod 261 drives the pressure block 24 to move closer to or away from the bending contact member 21. The clamping assembly 26 is a conventional linkage push-pull structure, so it will not be described in detail here. A horizontal inner protective groove 213 is formed on the side of the bending contact member 21, and the inner protective groove 213 bypasses the contact surface 211, the bent end 212, and the end opposite to the bent end 212 of the bending contact member 21. A pressing block 24 has a pressing groove formed on the side of the bending contact member 21 that matches the inner protective groove 213. In this embodiment, a rectangular extension plate 15 extending in the second direction is fixedly connected to the lower surface of the working disc 12, which compensates for the height difference while bearing the clamping assembly 26, and also saves material.

[0036] The bending mechanism 3 includes a rotating base 31, a rotating wrench 32, an adjustable connector 33, a pushing member 34, and a limiting pin 35. The rotating base 31 is fitted and rotatably connected to the support column 13, with one edge adjacent to the fine-tuning scale 141 and marked with a fine-tuning pointer 311. The elongated rotating wrench 32 is radially connected to the outer surface of the rotating base 31. The adjustable connector 33 is connected to the rotating wrench 32 via an elongated hole and a fastening bolt along its extension direction, making its position on the rotating wrench 32 adjustable, thereby allowing the distance between the pushing member 34 and the bent end 212 of the bending contact member 21 to accommodate raw materials of different specifications. A vertical rotating shaft 331 is provided at one end of the adjustable connector 33 near the support column 13, and the rotating shaft 331 passes through the surrounding hole 121 on the working disc 12. The pusher 34 is a horizontally positioned roller rotatably connected to the rotating shaft 331. The height of the pusher 34 matches the bending contact 21, and an outer protective groove 341 surrounds the pusher 34 at a position corresponding to the inner protective groove 213. The limiting pin 35 is a long, cylindrical strip radially connected to the outer surface of the rotating base 31. The limiting pin 35 is positioned between the fine-tuning pointer 311 and the rotating wrench 32.

[0037] The limiting block 4 is fastened to any position of the limiting elongated hole 111 by fastening bolts, and the rotation of the rotating seat 31 is blocked by interference with the limiting pin 35.

[0038] The raw material is positioned with a fixed part and a rotating part on either side of the pre-set bending position. The pusher 34 is positioned at the starting position corresponding to one end of the surrounding hole 121, and the raw material is placed on the work plate 12 along the first direction. Adjust the position of the positioning block 23 according to the preset length of the fixed part and the working scale 122, so that the raw material extends along the working scale 122, and the end of the fixed part away from the rotating part abuts against the positioning block 23. The bending position corresponds to the inner protective groove 213 of the bent end 212 of the bending contact member 21. Rotate the pressure rod 261 to clamp the raw material between the inner protective groove 213 of the contact surface 211 of the bending contact member 21 and the pressure groove of the pressure block 24. At this time, the rotating part of the raw material passes through at least part of the upper part of the surrounding hole 121. Push the rotating wrench 32 to drive the pusher 34 to rotate along the surrounding hole 121, so that the outer protective groove 341 abuts against the outer wall of the raw material and pushes the rotating part of the raw material to rotate around the bending position until the included angle between the rotating part and the fixed part of the raw material is read as the preset value through the working scale 122. Install and lock the limiting block 4 in the limiting long hole 111 so that the limiting block 4 just abuts against the limiting pin 35. After bending, the raw material is removed and its angle is precisely measured. The difference between the measured value and the preset value is the compensation value. The fine-tuning ring 14 is made to rotate freely by the fastening bolts, and the fine-tuning pointer 311 is made to correspond to any integer scale within the fine-tuning scale 141. The fine-tuning ring 14 is locked, the limit block 4 is released, and the rotating wrench 32 is adjusted so that the fine-tuning pointer 311 points to the scale corresponding to the compensation value. The limit block 4 is repositioned and locked. At this time, the position of the limit block 4 corresponds to the preset angle. The bending is then performed again, and the bending angle of the raw material has high accuracy.

[0039] The beneficial effects of this utility model are: it helps to improve the accuracy of bending and can be used with a variety of raw materials of different specifications.

[0040] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0041] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A bending fixture, characterized in that, The bending fixture is used to bend raw materials at a preset bending position, wherein the bending position of the raw materials has a fixed part and a rotating part on both sides, and the bending fixture includes: The base (1) includes a chassis (11), a working disc (12), a support column (13), and a fine-tuning ring (14). The support column (13), which is vertically arranged and cylindrical in shape, is supported between the horizontally arranged chassis (11) and the working disc (12). The working disc (12) is provided with a circumferential hole (121) extending around the support column (13), and a working scale (122) is provided on the edge of the working disc (121) away from the support column (13). The chassis (11) is provided with a limiting elongated hole (111) extending around the support column (13). The fine-tuning ring (14) is sleeved on the support column (13) and is controllably rotatably connected to the support column (13). A fine-tuning scale (141) is provided on the outer surface of the fine-tuning ring (14) near the edge of the working disc (12). The positioning mechanism (2) is installed on the side of the working plate (12) away from the chassis (11) for positioning the two ends of the fixing part of the raw material and fixing the fixing part of the raw material; The bending mechanism (3) includes a rotating seat (31) rotatably connected to the support column (13), a long strip-shaped rotating wrench (32) connected to the outer surface of the rotating seat (31), and a pusher (34) for pushing the rotating part of the raw material to rotate around the bending position. The position of the pusher (34) is matched with the surrounding hole (121). The rotating seat (31) is sleeved on the support column (13) and has a fine adjustment pointer (311) adjacent to the fine adjustment scale (141) on its surface. The limiting block (4) is fastened to any position of the limiting elongated hole (111) and its structure is matched with the bending mechanism (3) to prevent the rotation of the rotating seat (31).

2. The bending fixture as described in claim 1, characterized in that, The pusher (34) is configured as a horizontally arranged roller that is rotatably connected to the rotary wrench (32).

3. The bending fixture as described in claim 1, characterized in that, The surface of the fine-tuning ring (14) is connected to a fastening bolt, which rotates away from or abuts against the surface of the support column (13).

4. The bending fixture as described in claim 1, characterized in that, The positioning mechanism (2) includes a bending contact (21), a length scale (22), a positioning block (23), and a pressing block (24). The bending contact (21) has a contact surface (211) extending in a first direction and a bent end (212) for contacting the bending position of the raw material. The length scale (22) extends in the first direction and is partially adjacent to the contact surface (211) of the bending contact (21). The pressing block (24) is controllably close to or away from the contact surface (211) of the bending contact (21) for clamping or releasing the raw material. The positioning block (23) covers part of the length scale (22) and is used to contact the end of the fixing part of the raw material away from the bending position.

5. The bending fixture as described in claim 4, characterized in that, The bent end (212) of the bending contact member (21) is provided with an inner protective groove (213), and the push member (34) is provided with an outer protective groove (341) at the position of the inner protective groove (213).

6. The bending fixture as described in claim 4, characterized in that, The positioning block (23) is fastened to any position on the elongated hole extending along the first direction on the working disk (12).

7. The bending fixture as described in claim 4, characterized in that, The positioning mechanism (2) further includes a pressing assembly (26), which includes a pressure rod (261). The pressing block (24) moves controllably closer to or further away from the bending contact member (21) as the pressure rod (261) rotates.

8. The bending fixture as described in claim 4, characterized in that, The positioning mechanism (2) further includes a guide rail (25), which is arranged perpendicular to the first direction, and the pressure block (24) is slidably connected to the guide rail (25).

9. The bending fixture as described in claim 8, characterized in that, The guide rail (25) is fastened to any position on the elongated hole extending along its extension direction on the working disc (12).

10. The bending fixture as described in claim 1, characterized in that, The pusher (34) is fastened to any position on the elongated hole extending along the extension direction of the rotary wrench (32).

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