CN203526271U - Manual pipe bending tool - Google Patents

Abstract

The utility model relates to a bending tool for pipes, profiles and rods, in particular to a manual pipe bending tool. The manual pipe bending tool includes a base plate, which is guided and moved along the left and right directions and is equipped with a punch. The connection is a circular arc transition. The bottom end of the punch is connected with a driving mechanism for driving the punch to move in the left and right directions. The two rollers are used to cooperate with the punch to clamp and bend the pipe to be processed. The axes of the rollers extend along the up and down direction. By adopting the utility model, the processed pipe fittings can be evenly stressed during bending, and the obtained bent pipes are of high quality.

Description

Hand Bending Tool

technical field

The utility model relates to a bending tool for pipes, profiles and rods, in particular to a manual pipe bending tool.

Background technique

The Chinese patent document with the application number 201020612517.3 discloses a manual pipe bending tool. The pipe bending tool has a complex structure and usually needs to be fixedly assembled on the workbench. Between the blocks, turn the eccentric wheel to push the I-shaped movable pressure block to clamp the pipe to be processed. The other end of the pipe to be processed is inserted between the fixed wheel and the movable wheel, and the pipe to be processed is bent and formed by turning the handle of the turning plate. When the manual pipe bending tool is in use, it is cumbersome to clamp the pipe to be processed, and the force of the pipe to be processed is not stable, and has the disadvantages of poor processing quality and low bending efficiency.

Contents of the invention

The purpose of the utility model is to provide a manual pipe bending tool to solve the problem in the prior art that the processed pipe fittings are not subjected to stable force during bending.

In order to achieve the above object, the utility model adopts the following technical scheme: the manual pipe bending tool includes a base plate, and the base plate guides and moves along the left and right directions and is equipped with a punch. The punch includes a base and a head protruding to the right on the base The arc-shaped convex part, the connection between the arc-shaped convex part and the right end of the base is a circular arc transition, the bottom end of the punch is connected with a driving mechanism for driving the punch to move in the left and right direction, and the right end of the bottom plate is provided with a punch Corresponding to the top of the head, two rollers are symmetrically distributed on the front and rear sides of the arc-shaped convex part, and are used to cooperate with the punch to clamp and bend the pipe to be processed. The axes of the rollers extend along the up and down direction.

The drive mechanism includes a push rod axially extending left and right, the right end of the push rod is connected to the left end of the punch, and the left end is connected to the handle. The nut has a positioning screw hole axially extending along the left and right directions for screwing in the external thread segment.

The ejector rod includes a cylindrical section at the right end, and a hemispherical convex part protruding to the right is fixed or integrated on the right end surface of the cylindrical section. The left end surface of the hemispherical convex part is a circular plane, and the diameter of the circular plane is larger than The diameter of the cylindrical section, the left end surface of the punch is provided with a through-slot hole that runs through the front and rear directions of the rod, and the through-slot hole is a stepped hole, and the stepped hole includes a small hole on the left end for mating with the cylindrical section , The large hole on the right end for mating fit of hemispherical protrusions.

The punch also includes a rod that is fixed or integrally arranged on the left end of the base and moves axially along the left and right directions. The base is fixedly equipped with a guide block. A guide hole for inserting the rod and guiding the rod.

The push rod also includes a screw section at the left end, the handle includes a handle nut, and the handle nut is provided with more than two handle rods distributed along the circumference, the left end of each handle rod is provided with a handle ball, and the right end surface of the handle nut has a Right screw hole into which the screw segment is screwed.

The handle nut and the screw section are correspondingly provided with a round hole communicating with the right screw hole extending in the up and down direction, and a first cylindrical pin for preventing the handle nut and the ejector rod from rotating relative to each other is inserted in the round hole.

The internal thread of the positioning screw hole and the external thread of the external thread section are trapezoidal threads.

The base plate is equipped with a positioning shaft, and the roller is sleeved on the positioning shaft. The upper end of the positioning shaft has an end cover for positioning the upper end of the roller, and the lower end passes through the base plate and is fastened by a hex nut.

The bottom plate is provided with mounting holes for mounting screws so that the bottom plate can be fixedly assembled on the workbench.

Beneficial effects of the utility model: the utility model is simple in structure, and the manual pipe bending tool of the utility model is used to facilitate the clamping of the processed pipe fittings when processing the processed pipe fittings, and only needs to assemble the processed pipe fittings in the punching Between the head and the roller, the driving mechanism drives the punch to move along the direction of the top of the punch, and the processed pipe can be bent through the clamping cooperation between the punch and the two rollers; in this process, the processed pipe is three-point Stress, the three stress points are respectively located at the two rollers and the top of the arc-shaped convex part. Due to the stability of the triangle, the processed pipe is evenly stressed during bending, and the quality of the bent pipe obtained is high; After a pipe to be processed is processed, as long as the driving mechanism drives the punch to move along the direction of the bottom end of the punch, the elbow can be taken out directly, and then the next pipe to be processed is processed, which has the advantage of high processing efficiency; The utility model has a wide range of bending angles, and the shape of the punch and the position of the roller can be changed according to actual needs to achieve bending processing with different diameters or angles; the utility model has a wide range of work and can be directly transported to the production site. The processed pipe fittings are bent.

Further, the first cylindrical pin can prevent relative rotation between the handle nut and the push rod.

Description of drawings

Fig. 1 is the use state figure of a kind of embodiment of manual pipe bending tool of the present invention;

Fig. 2 is a partial sectional view of Fig. 1;

Fig. 3 is A-A view among Fig. 2;

Fig. 4 is a partial enlarged view of K in Fig. 2 .

Detailed ways

An embodiment of the manual pipe bending tool of the present invention is shown in Fig. 1-4: the manual pipe bending tool includes a base plate 1, and a punch 2 is mounted on the base plate 1 to guide and move along the left and right directions.

The punch 2 includes, from left to right, a rod portion 21 that moves axially along the left and right directions, a base 22 that is fixedly connected or integrally connected with the rod portion 21, and a base 22 that is fixedly connected or integrally connected with the base 22 and whose head protrudes to the right. The arc-shaped convex portion 23, the connection between the arc-shaped convex portion 23 and the right end of the base 22 is a circular arc transition, and the section near the edge of the right end surface of the base 22 is a straight line segment, which can realize accurate positioning of the processed pipe 9. The right end of the bottom plate 1 is equipped with two rollers 4 corresponding to the top (right end) of the punch 2. The axis of the rollers 4 extends along the up and down direction. The first roller 4 can be used to cooperate with the punch 2 to clamp and bend the pipe 9 to be processed. The bottom plate 1 is equipped with positioning shafts 5 corresponding to the rollers 4, and each roller 4 is sleeved on the corresponding positioning shafts 5. The upper end of the positioning shaft 5 has an end cap 51 for positioning the upper end of the rollers 4, and the lower end has external threads. , the part where the lower end of the positioning shaft 5 passes through the base plate 1 is sleeved with a hexagonal nut 6 , and the lower end of the positioning shaft 5 is fastened by the hexagonal nut 6 .

The bottom end (left end) of the punch 2 is connected with a driving mechanism for driving the punch 2 to move in the left and right direction. The drive mechanism includes a push rod 3 axially extending left and right, the right end of the push rod 3 is connected to the left end of the punch 2, and the left end is connected to the handle. The push rod 3 includes a screw segment 31 and an external thread segment from left to right 32. Cylindrical section 33, hemispherical protrusion 34 protruding to the right.

The handle comprises a handle nut 113, the handle nut 113 is provided with more than two handle rods 111 distributed along the circumference, the left end of each handle rod 111 is provided with a handle ball 112, and the right end surface of the handle nut 113 has a screw rod section 31 The right screw hole that is screwed in, the handle nut 113 and the screw rod segment are correspondingly provided with a round hole that is communicated with the right screw hole and extends in the up and down direction, and the round hole is inserted with the first one for preventing the handle nut 113 and the push rod 3 from rotating relative to each other. A cylindrical pin 101. The base 22 is fixedly equipped with a positioning nut 7, and the positioning nut 7 has a positioning screw hole extending axially along the left and right directions for screwing in the external thread section 32. In this embodiment, the internal thread of the positioning screw hole and the external thread The external thread of the threaded section 32 is a trapezoidal thread, the positioning nut 7 is a trapezoidal nut, and the trapezoidal nut is fixed on the bottom plate 1 by the first bolt 103 . The hemispherical convex part 34 is fixed or integrally arranged on the right end surface of the cylindrical section 33 , and the left end surface of the hemispherical convex part 34 is a circular plane whose diameter is larger than that of the cylindrical section 33 . The left end surface of the rod 21 is provided with a through-slot hole that runs through the front and rear directions of the rod 21. The through-slot hole is a stepped hole, and the stepped hole includes a small hole on the left end for mating with the cylindrical section 33, and a small hole on the right end for the hemisphere. The large hole in which the protruding portion 34 is mated. The base 22 is fixedly equipped with a guide block 8 . The guide block 8 is positioned by the second cylindrical pin 102 and fixedly assembled on the bottom plate 1 by the second bolt 104 . The guide block 8 is provided with a guide hole whose axis extends along the left-right direction, for inserting the rod part 21 and guiding and positioning the rod part 21 .

The bottom plate 1 is provided with mounting holes 11 for mounting screws so that the bottom plate 1 can be fixedly assembled on the workbench, and the pipe bending tool can be assembled on the workbench if necessary. The middle part of the bottom plate 1 in the front-back direction has a hollow structure, which can reduce the weight of the manual pipe bending tool.

The utility model has a wide range of bending angles, and the shape of the punch 2 and the position of the roller 4 can be changed according to actual needs to realize bending processing with different diameters or different angles.

The use process of the embodiment of the above-mentioned manual pipe bending tool: adjust the position of the punch 2 through the handle, so that the rightmost end of the arc-shaped convex part 23 of the punch 2 is placed on the left side of the line connecting the two rollers 4, and then the pipe to be processed 9 is clamped between the arc-shaped convex part 23 and the roller 4, and the handle is manually turned to make the handle drive the ejector rod 3 to move to the right, and the ejector rod 3 drives the punch 2 to move to the right. During this process, the punch 2 and the The clamping cooperation of the two rollers 4 can complete the bending process of the processed pipe 9 .

In other embodiments of the manual pipe bending tool of the present invention, the hollow structure of the middle part of the base plate in the front-rear direction can also be omitted, and the weight of the base plate is heavy at this time.

In other embodiments of the manual pipe bending tool of the present invention, the mounting holes can also be omitted, the bottom plate is placed on the workbench, and the bottom plate is fixed by a pressing block.

In other embodiments of the manual pipe bending tool of the present invention, the round hole of the handle nut and the first cylindrical pin can also be omitted, but at this time the handle nut and the ejector rod may rotate relative to each other.

In other embodiments of the manual pipe bending tool of the present invention, the screw section of the ejector rod and the right screw hole of the handle nut can also be omitted, and the ejector rod and the handle nut are fixedly connected by welding.

In other embodiments of the manual pipe bending tool of the present invention, the rod portion of the punch can also be omitted, and the left end of the base of the punch is directly connected to the ejector rod through transmission.

Claims (9)

1. The manual pipe bending tool is characterized in that: it includes a base plate, and the base plate is guided and moved along the left and right directions to be equipped with a punch. The connection between the arc-shaped convex part and the right end of the base is a circular arc transition. The bottom end of the punch is connected with a drive mechanism for driving the punch to move in the left and right directions. The two rollers on the front and rear sides of the arc-shaped convex part are used to cooperate with the punch to clamp and bend the pipe to be processed. The axes of the rollers extend along the up and down direction. 2. The manual pipe bending tool according to claim 1, characterized in that: the driving mechanism includes a push rod extending axially left and right, the right end of the push rod is connected to the left end of the punch, and the left end is connected to the handle. The ejector rod includes an external thread section in the middle, and a positioning nut is fixedly mounted on the base, and the positioning nut has a positioning screw hole extending axially along the left and right directions for screwing in the external thread section. 3. The manual pipe bending tool according to claim 2, characterized in that: the ejector rod includes a cylindrical section at the right end, and a hemispherical convex part protruding to the right is fixedly or integrally provided on the right end surface of the cylindrical section, the said The left end surface of the hemispherical convex part is a circular plane, the diameter of the circular plane is greater than the diameter of the cylindrical section, and the left end surface of the punch is provided with a through-slot hole running through the front and rear direction of the rod, and the through-slot hole is a stepped The stepped hole includes a small hole at the left end for mating with the cylindrical section, and a large hole at the right end for mating with the hemispherical protrusion. 4. The manual pipe bending tool according to claim 1, characterized in that: the punch further includes a rod part fixed or integrally arranged on the left end of the base and axially moving along the left and right directions, and the base is fixedly equipped with A guide block, the guide block is provided with a guide hole extending axially along the left and right directions for inserting the rod and guiding the rod. 5. The manual pipe bending tool according to claim 2, characterized in that: the ejector rod also includes a screw section at the left end, the handle includes a handle nut, and the handle nut is provided with more than two handle rods distributed along the circumferential direction, each The left end of each handle rod is provided with a handle ball, and the right end surface of the handle nut has a right screw hole for screwing in the screw rod section. 6. The manual pipe bending tool according to claim 5, characterized in that: the handle nut and the screw section are correspondingly provided with a round hole communicating with the right screw hole and extending in the up and down direction, the round hole is inserted with a The first straight pin that prevents the relative rotation of the handle nut and the push rod. 7. The manual pipe bending tool according to claim 2, characterized in that: the internal thread of the positioning screw hole and the external thread of the external thread section are trapezoidal threads. 8. The manual pipe bending tool according to claim 1, characterized in that: the bottom plate is equipped with a positioning shaft, the roller is sleeved on the positioning shaft, and the upper end of the positioning shaft has an end for positioning the upper end of the roller. The cover and the lower end pass through the bottom plate and are fastened by hex nuts. 9. The manual pipe bending tool according to claim 1, characterized in that: the bottom plate is provided with mounting holes for mounting screws so that the bottom plate can be fixedly assembled on the workbench.

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