CN220497424U - Pipe bending device - Google Patents

Abstract

The utility model relates to a pipe bending device, comprising: the bending device is characterized in that the clamping die for the straight pipe is clamped on the bending die, after a bending angle is set, the handle is pulled by hand, so that the bending die rotates, the straight pipe leans against an arc groove of the profiling die to slide along with the rotation of the bending die in a straight line, and after the bending die is blocked by the fine tuning screw on the fixed angle limiting block, the bending angle requirement is met, the clamping die is loosened, and the successfully bent forming bent pipe is taken down. The pipe bending device has reasonable design, novel structure, accurate pipe bending angle, no indentation and high cost performance.

Description

Pipe bending device

Technical Field

The utility model relates to a pipe bending device.

Background

At present, the pipe bending device has a plurality of types, and a plurality of types of numerical control hydraulic pipe bending machines with high automation degree and various types of hydraulic or manual pipe bending machines are generally used, but all have the following problems: firstly, the cost of the pipe bender with high automation degree is very high, for products with small quantity or one-time quantity of bent pipes, the cost performance is not high, other forms of hydraulic or manual pipe bending machines are used for buying a bent workpiece, or the bent workpiece is provided with an indentation on the bent pipe, the indentation is obvious after the surface is coated, the reason for rejecting the products by customers is that the bent angle of the bent pipe is lack of interchangeability. Production, operation and management of small and medium enterprises are always plagued.

Disclosure of Invention

The purpose of the utility model is that: the pipe bending device is low in input cost, bent pipe fittings are not provided with indentations, the bending angle is controllable, the bent pipe fittings are interchangeable, and the defects of the existing pipe bending machine are overcome.

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

the pipe bending device comprises a bottom plate 1, a profiling frame 2, a profiling 3, a mandrel 4, a clamping die 5, a pipe bending die 6, a locking nut 7, an angle limiting block 8, a fine adjustment screw 9, a straight pipe 10, a handle 11, a pipe clamping bolt 12 and a formed bent pipe 13, and is characterized in that: the spindle 4 is positioned in the spindle positioning hole on the base plate 1 by means of the spindle positioning circle 403 on the spindle 4, and the spindle 4 is connected with the base plate by means of the plurality of spindle fixing holes 404 on the spindle 4 and the plurality of spindle fixing holes 103 on the base plate 1 by means of screws.

The mandrel locating hole 801 on the angle limiting block 8 is sleeved on the angle limiting block locating circle 402 on the mandrel 4, the mandrel can swing around the mandrel 4 to fix the shaft, a locating angle which is a little bigger than the requirement is preliminarily determined according to the bending angle of the bent pipe 13, the angle limiting block 8 is fixed on the bottom plate 1 by means of the screw bearing surface 802, the screw penetrating groove 803 and the plurality of angle limiting block fixing holes 102 and screws on the bottom plate 1, the fine adjusting screw 9 is screwed on the screw hole 804 on the angle limiting block 8 and is locked on the angle limiting block 8 by the locking nut 7, the locking nut 7 is loosened according to the angle adjustment requirement, the angle of the bent pipe can be accurately adjusted by the fine adjusting screw 9, and the requirement of accurate bent pipe angle is met.

The pipe bending die 6 is positioned on the pipe bending die positioning circle 401 on the mandrel 4 in a precise sliding fit mode by means of the pipe bending die mandrel positioning circle 602, the pipe bending die 6 can flexibly rotate on the mandrel 4, the clamping die 5 is connected with the clamping die fixing screw holes 604 on the pipe bending die 6 by means of four clamping die fixing through holes 501 through screws, when the straight pipe 10 is clamped, the screws are screwed down, when the bent pipe 13 is taken, the screws are loosened, the two three buckles are loosened, and the handle 11 is connected with the handle fixing holes 607 on the pipe bending die 6 through screws, so that bending stress when a workpiece is bent can be born.

The profiling frame 2 is fixedly connected with four profiling frame screw fixing holes 105 on the bottom plate 1 by means of four profiling frame fixing through holes 202, the profiling frame 3 is connected with four profiling frame fixing through holes 201 on the profiling frame 2 by means of four profiling frame screw fixing holes 301, when the straight pipe 10 is clamped, a concentric circle is formed by a profiling workpiece positioning circular arc 302 on the profiling frame 3 and a clamping workpiece positioning circular arc 502 on the clamping die 5, the straight pipe 10 before bending is limited between the profiling workpiece positioning circular arc 302 on the profiling frame 3 and the clamping workpiece positioning circular arc 502 on the clamping die 5, and in the bending process, the bent pipe 13 generates relative displacement relative to the profiling frame 3 according to the bending angle, and the bent pipe 13 does not have relative displacement relative to the clamping die 5.

The base plate 1 is fixed on a general frame or workbench with enough rigidity by means of four frame fixing holes, can be welded on the frame, and can also be used for determining the method for fixing the base plate according to actual conditions.

The pipe bending die 6 is provided with a pipe bending die forming circular arc 601, a pipe bending die mandrel positioning circle 602, a lubricating oil injection port 603, a clamping die fixing screw hole 604, a workpiece clamping measuring reference 605, a clamping workpiece positioning circular arc 606, a handle fixing hole 607 and a tangent circular arc 608.

The beneficial effects of the utility model are as follows:

1. when the batch investment of the bent pipes is not large, the cost is low, and compared with a numerical control automatic bending machine, the cost performance is higher.

2 a pipe bending device. The angle of the bent pipe can be accurately controlled, and the bent pipe has interchangeability.

3 a pipe bending device. The installation environment and the mode are not high, the common workbench and the frame can be installed and fixed, and the common workbench and the frame can be fixed by bolts, welded and fixed or pressed plates and the like.

The present utility model will be described in detail with reference to the accompanying drawings.

Drawings

FIG. 1: a front view of a pipe bending device.

Fig. 2: a left side view of the pipe bending device.

Fig. 3: a perspective view of a pipe bending device.

Fig. 4: a workpiece clamping schematic diagram of a pipe bending device.

Fig. 5: a schematic diagram of a workpiece of the pipe bending device after being formed.

Fig. 6: an assembly structure diagram of a mandrel, a pipe bending die and an angle limiting block of the pipe bending device.

Fig. 7: a three-dimensional structure diagram of a bottom plate of a pipe bending device.

Fig. 8: a three-dimensional structure diagram of a profiling frame of a pipe bending device.

Fig. 9: a profiling three-dimensional structure diagram of a pipe bending device.

Fig. 10: a mandrel structure diagram of a pipe bending device.

Fig. 11: a three-dimensional structure diagram of a clamping die of a pipe bending device.

Fig. 12: a three-dimensional structure diagram of a bending die of a pipe bending device.

Fig. 13: a three-dimensional structure diagram of an angle limiting block of a pipe bending device.

In the accompanying drawings: 1-floor, 2-die holder, 3-die holder, 4-mandrel, 5-clamp, 6-pipe die, 7-lock nut, 8-angle stopper, 9-trimming screw, 10-straight pipe 11-handle, 12-clamp bolt, 13-forming elbow, 101-frame fixing hole, 102-angle stopper fixing hole, 103-mandrel fixing hole, 104-mandrel positioning hole, 105-die holder screw fixing hole, 201-die holder fixing hole, 202-die holder fixing hole, 301-die screw fixing hole, 302-die workpiece positioning circular arc, 401-clamp die positioning circular arc, 402-angle stopper positioning circular arc, 403-mandrel positioning circular arc, 404-mandrel fixing hole, 501-clamp die fixing hole, 502-clamp die workpiece positioning circular arc, 601-pipe die forming circular arc, 602-clamp die mandrel positioning circular arc, 603-lubricating oil injection port, 604-clamp die fixing screw hole, 605-workpiece clamping measurement reference, 606-clamp workpiece positioning circular arc, 607-handle fixing hole, 608-tangential line, 801-mandrel positioning circular arc, 802-mandrel positioning hole, 802-screw hole, 802-clamp die screw hole, 803-through hole, 804-through hole, and 804-through hole.

Description of the embodiments

The spindle 4 is positioned in the spindle positioning hole on the base plate 1 by means of the spindle positioning circle 403 on the spindle 4, and the spindle 4 is connected with the base plate by means of the plurality of spindle fixing holes 404 on the spindle 4 and the plurality of spindle fixing holes 103 on the base plate 1 by screws, as shown in the specification of fig. 1, the specification of fig. 2, the specification of fig. 3, the specification of fig. 6, the specification of fig. 7, the specification of fig. 10 and the specification of fig. 13.

The mandrel positioning holes 801 on the angle limiting blocks 8 are sleeved on the angle limiting block positioning circles 402 on the mandrel 4 and can swing around the mandrel 4 in a fixed shaft mode, a positioning angle which is slightly larger than the requirement is preliminarily determined according to the bending angle of the bent pipe 13, the angle limiting blocks 8 are fixed on the bottom plate 1 by means of the screw bearing surfaces 802, the screw penetrating grooves 803 and the plurality of angle limiting block fixing holes 102 and screws on the bottom plate 1, the fine adjusting screws 9 are screwed on screw holes 804 on the angle limiting blocks 8 and locked on the angle limiting blocks 8 by the locking nuts 7, the locking nuts 7 are loosened according to the angle adjustment requirement, and the fine adjusting screws 9 can accurately adjust the angle of the bent pipe to meet the requirement of accurate angle of the bent pipe.

The pipe bending die 6 is positioned on a pipe bending die positioning circle 401 on a mandrel 4 in a precise sliding fit mode by means of a pipe bending die mandrel positioning circle 602, the pipe bending die 6 can flexibly rotate on the mandrel 4, the clamping die 5 is connected with a clamping die fixing screw hole 604 on the pipe bending die 6 by means of four clamping die fixing through holes 501 by screws, when the straight pipe 10 is clamped, the screws are tightened, when the bent pipe 13 is taken, the screws are loosened, and the handles 11 are connected with handle fixing holes 607 on the pipe bending die 6 by threads so as to bear bending stress when a workpiece is bent.

The drawing 1, drawing 2, drawing 3, drawing 4, drawing 5, drawing 8 and drawing 9 show that the drawing 2 is fastened and connected with the four drawing screw fixing holes 105 on the bottom plate 1 by means of four drawing screw fixing holes 202, the drawing 3 is connected with the four drawing screw fixing holes 201 on the drawing 2 by means of screws, when the straight pipe 10 is clamped, the drawing workpiece positioning arc 302 on the drawing 3 and the drawing workpiece positioning arc 502 on the drawing 5 are in outer concentric positions, the straight pipe 10 before bending is limited between the drawing workpiece positioning arc 302 on the drawing 3 and the drawing workpiece positioning arc 502 on the drawing 5, during the bending process, the bent pipe 13 generates relative displacement relative to the drawing 3 according to the bending angle, and the bent pipe 13 does not generate relative displacement relative to the drawing 5.

In the specification, as shown in figure 12, a pipe bending die forming circular arc 601, a pipe bending die mandrel positioning circular arc 602, a lubricating oil injection port 603, a clamping die fixing screw hole 604, a workpiece clamping measuring reference 605, a clamping workpiece positioning circular arc 606, a handle fixing hole 607 and a tangent circular arc 608 are arranged on the pipe bending die 6. Wherein the pipe bending die forming circular arc 601 is used for positioning and clamping the straight pipe 10; a pipe bending die mandrel positioning circle 602 and a lubricating oil injection port 603, which are used for positioning the pipe bending die on the mandrel and lubricating the pipe bending die in the working process; the clamping die fixing screw holes 604 are stress supporting points for clamping the straight pipe 10 by the clamping die 5; the pipe bending die forming arc 601 and the clamping workpiece positioning arc 606 are two sections of tangential arcs, a tangential arc 608 is formed after the two sections of tangential arcs are tangential, the distance from the tangential arc 608 to the workpiece clamping measurement reference 605 is equal to the length of the clamping die 5, one end of the clamping die 5 is aligned with the workpiece clamping measurement reference 605, the other end of the clamping die 5 is aligned with the tangential arc 608, and two ends of the clamping die 5 can also be used as measurement reference references for clamping straight pipes. The workpiece clamping measurement reference 605 is a reference for measuring the length of a straight pipe according to one end of a bent pipe and a tangent circular arc of a drawing, so that the straight section at one end of the bent pipe 13 is unqualified and scrapped after the bent pipe is bent, the length of the straight pipe 10 is generally properly lengthened by a few millimeters according to the unfolding length of the bent pipe 13 drawing, the workpiece clamping measurement reference 605 at one end is accurately positioned, the straight pipe 10 is clamped by the clamping die 5, and the other end of the bent pipe 13 is machined after the bent pipe is successful to meet the size requirement of an attached drawing.

In the specification, as shown in figure 7, a frame fixing hole 101, an angle limiting block fixing hole 102, a mandrel fixing hole 103, a mandrel positioning hole 104 and a profiling frame thread fixing hole 105 are formed in the bottom plate 1. The frame fixing hole 101 is used for fixing the whole of a pipe bending device; the angle limiting block fixing holes 102 are used for fixing preliminary positioning of the angle limiting block 8, and the angle between adjacent holes of the angle limiting block fixing holes 102 is a constant value, here ten degrees; the mandrel fixing hole 103 is a screw hole and is fastened together by adopting the connection of a screw and the mandrel 4; the spindle positioning hole 104 is used for positioning the center of the spindle 4.

The accompanying figure 9 of the specification shows: a profiling thread fixing hole 301 and a profiling workpiece positioning arc 302 are arranged on the profiling. The profiling 3 is fixed on the profiling frame 2 by means of four profiling thread fixing holes 301, the straight pipe 10 is positioned on a profiling workpiece positioning arc 302, arc surfaces are in contact, lubricating oil is coated on the contact arc surfaces, stress in the pipe bending process is uniformly dispersed, stress concentration is avoided, and indentation is avoided. The profiling 3 is stationary during the bending process and the straight tube 10 slides linearly with the bending process on the profiling workpiece positioning arc 302 of the profiling 3.

The accompanying figure 10 of the specification shows: the mandrel 4 is provided with a pipe bending die positioning circle 401, an angle limiting block positioning circle 402, a mandrel positioning circle 403 and a mandrel fixing hole 404. The pipe bending die positioning circle 401 is used for positioning the center of the pipe bending die 6, and can enable the pipe bending die 6 to rotate around the mandrel 4 in a fixed axis manner to realize bending of the straight pipe 10 into the formed bent pipe 13; the angle limiting block positioning circle 402 is used for positioning the circle center of the angle limiting block 8, so that the angle limiting block 8 can swing around the mandrel 4 in a fixed axis manner; the mandrel positioning circle 403 and the mandrel fixing hole 404 are used for positioning and fixing the center of the mandrel 4 on the bottom plate 1, so that the positioning pivot of the pipe bending die 6 is fixed.

The accompanying figure 11 of the specification shows: four fixing through holes 501 and a clamping die workpiece positioning circular arc 502 are arranged on the clamping die 5. The fixing through holes 501 are used for the penetration of screws, so that the clamping die 5 and the pipe bending die 6 are connected together, and the straight pipe 10 is clamped on the pipe bending die 6; the straight pipe 10 is placed on the clamping die workpiece positioning circular arc 502 and the pipe bending die 6 to clamp the workpiece positioning circular arc 606, and cannot be flattened in the clamping process.

The accompanying figure 13 of the specification shows: the angle limiting block 8 is provided with a mandrel positioning hole 801, a screw bearing surface 802, a screw penetrating groove 803 and a screw hole 804. The mandrel positioning hole 801 is sleeved on the angle limiting block positioning circle 402 of the mandrel 4, so that the angle limiting block 8 can swing around the mandrel 4, a screw passes through the screw penetrating groove 803 and is pressed on the screw bearing surface 802, the angle limiting block 8 can be fixed on the bottom plate 1, and the fine adjustment of the bending angle can be realized by screwing the thread of the fine adjustment screw 9 into the screw hole 804.

The working process of the pipe bending device comprises the following steps: before working, firstly coating lubricating oil on the inner surface of a positioning circular arc of a profiling workpiece of a profiling 3, then injecting a proper amount of lubricating oil into a lubricating oil injection port of a pipe bending die 6, positioning a workpiece straight pipe 10 according to the technical requirement of the size of a formed bent pipe by a workpiece clamping measurement standard 605 on the pipe bending die 6, clamping the workpiece straight pipe on the pipe bending die 6 by a clamping die 5, preliminarily determining a bending angle according to the number of holes of an angle limiting block fixing hole 102 on a bottom plate 1, then pulling a handle 11 by hand to enable the pipe bending die 6 to rotate around a mandrel 4 in a fixed shaft, enabling the pipe bending die to be blocked by a fine adjustment screw 9 on a fixed angle limiting block 8, enabling the pipe bending die to return to a certain angle, detecting the bending angle by adopting a special measuring tool, obtaining the bending angle which is not bent in place, then adjusting again by the fine adjustment screw 9 until the bending angle requirement is reached, loosening a fastening screw of the clamping die 5, and taking down the formed bent pipe 13 which is bent successfully. After the bending angle is adjusted, the straight pipe 10 is clamped again, the handle 11 is pulled, the pipe bending die 6 is blocked to the fine adjustment screw 9 on the fixed angle limiting block 8, the pipe bending die 6 returns to the initial position, the fastening screw of the fastening clamp die 5 is loosened, and the formed bent pipe 13 which is successfully bent is taken down. The bent pipe can be produced in batches by repeating the above actions. The pipe bending device has reasonable design, novel structure, accurate pipe bending angle, no indentation and high cost performance.

Claims (2)

1. A pipe bending apparatus comprising: bottom plate (1), profiling frame (2), profiling (3), mandrel (4), clamp mould (5), bent pipe mould (6), lock nut (7), angle stopper (8), fine setting screw (9), straight tube (10), handle (11), clamp pipe bolt (12) and shaping return bend (13), characterized by: the mandrel (4) is positioned in the mandrel positioning hole (104) on the bottom plate (1) by means of the mandrel positioning circle (403) on the mandrel (4), the mandrel (4) is connected with the bottom plate (1) by means of a plurality of mandrel fixing holes (404) on the mandrel (4) and a plurality of mandrel fixing holes (103) on the bottom plate (1) by screws, the mandrel positioning hole (801) on the angle limiting block (8) is sleeved on the angle limiting block positioning circle (402) on the mandrel (4), the mandrel (4) can swing around the fixed shaft, a positioning angle which is slightly worse than the required angle is preliminarily determined according to the bending angle of the formed bent pipe (13), the angle limiting block (8) is fixed on the bottom plate (1) by means of a screw bearing surface (802), a threading slot (803) and a plurality of angle limiting block fixing holes (102) on the bottom plate (803), a fine adjusting screw (9) is screwed on a screw hole (804) on the angle limiting block (8) and is locked on the angle limiting block (8) by a locking nut (7), the angle limiting block (7) is loosened according to the angle adjustment, the requirement of the locking nut (7) is locked, the angle is accurately adjusted, and the angle is required to be locked after the angle is adjusted, the pipe bending die (6) is positioned on a pipe bending die positioning circle (401) on a mandrel (4) in a precise sliding fit mode by virtue of a pipe bending die mandrel positioning circle (602), the pipe bending die (6) can flexibly rotate on the mandrel (4), the clamping die (5) is connected with clamping die fixing screw holes (604) on the pipe bending die (6) by virtue of four clamping die fixing through holes (501) through screws, when a straight pipe (10) is clamped, the screws are tightened, when a formed bent pipe (13) is taken, the screws are loosened, two three buckling wires are loosened, a handle (11) is connected with a handle fixing hole (607) on the pipe bending die (6) through threads, so as to bear bending stress when a workpiece is bent, a die holder (2) is connected with four die holder screw fixing holes (105) on a base plate (1) through four die fixing through screws, a die (3) is connected with four die fixing through holes (201) through four die screw fixing holes (301) through screws, when the straight pipe (10) is clamped, the straight pipe (2) is clamped on the workpiece (3) through screws and the straight pipe (302) is clamped, and the workpiece (5) is positioned on an arc of the arc-shaped straight pipe (302), the method is characterized in that a straight pipe (10) before bending is limited between a profiling workpiece positioning arc (302) on a profiling (3) and a clamping workpiece positioning arc (502) on a clamping die (5), in the bending process, a formed bent pipe (13) generates relative displacement relative to the profiling (3) according to the bending angle, the formed bent pipe (13) does not generate relative displacement relative to the clamping die (5), a bottom plate (1) is fixed on a general frame or a workbench with enough rigidity by means of four frame fixing holes (101), the base plate can be welded on the frame, and a method for fixing the bottom plate can be determined according to actual conditions.

2. The pipe bending device according to claim 1, wherein a pipe bending die forming circular arc (601), a pipe bending die mandrel positioning circular arc (602), a lubricating oil injection port (603), a clamping die fixing screw hole (604), a workpiece clamping measuring reference (605), a clamping workpiece positioning circular arc (606), a handle fixing hole (607) and a tangent circular arc (608) are arranged on the pipe bending die (6).