CN205463777U - Hydraulic pressure bending press - Google Patents

Abstract

The utility model discloses a hydraulic pressure bending machine in the field of pipe fitting processing equipment, which comprises: a frame, the lower part of the frame extends forward from the work table, a lower die is arranged on the work table, and a pick protruding forward is arranged on the top of the frame. Beam arm, a pair of guide rails are arranged on the frame between the beam arm and the worktable, and the guide slots of the two vertical guide rails are arranged opposite to each other; the bending cylinder is fixed on the beam arm, and the bending cylinder The piston rod protrudes downwards from the beam arm and connects with the large carriage. The bottom of the large carriage is provided with an upper mold. The two sides of the large carriage are respectively embedded in the guide grooves of the two guide rails. , the large carriage can move up and down in the two guide rails, so that the upper mold and the lower mold can be closed or separated from each other. The utility model has the advantages of simple structure, low production cost, and can eliminate the gap between the guide rail and the large carriage by adjusting the position of the guide rail so as to improve the quality of the bent pipe.

Description

hydraulic press brake

technical field

The utility model relates to the field of pipe fitting processing equipment, in particular to a hydraulic pressure bending machine.

Background technique

The function of the bending machine is mainly to bend and form the pipe fittings. At present, the commonly used bending machines in the industry include: a frame, a worktable is installed on the frame, a lower mold is fixedly installed on the worktable, and four parts of the worktable Columns are vertically installed on each corner, and a top plate is fixedly installed on the top of the four columns. A movable plate is also arranged between the top plate and the worktable. The movable plate is movably set on the four columns. The upper die is fixedly installed on the bottom, and a bending cylinder is fixedly installed on the top plate. The piston rod of the bending cylinder passes through the top plate and is connected with the movable plate. The upright slides up and down. When working, place the pipe to be bent in the cavity groove of the lower die, and then start the bending cylinder, the piston rod of the bending cylinder drives the movable plate to move down along the column until the upper die and the lower die are closed. Bending the pipe into shape.

The press brake with the above structure has the following disadvantages: 1. The work space for press bending is surrounded by the top plate, the work table and four columns. The work space is too limited, which often causes the opening distance between the upper and lower dies to be too Too small to place fittings. In this way, the length of the column must be increased accordingly, so that the opening distance of the upper and lower molds is increased to meet the bending requirements, which undoubtedly increases the manufacturing cost. In addition, some pipe fittings need to undergo multiple bending and forming. When the subsequent bending process is performed, the previous bending part of the pipe fitting will be interfered by the four columns and may not be able to be straightened; 2. The upper mold follows the movable plate together For sports, the sliding fit between the movable plate and the four columns must be processed precisely. If the fit is too tight, the sliding resistance will increase, which will lead to problems such as slower bending speed, lower efficiency, and greater energy consumption of the bending cylinder; If the fit is too loose, it is easy to cause the upper and lower dies to not be on the same center plane, which will cause the pipe fittings to be squeezed and deformed, which will affect the product quality.

Utility model content

The technical problem to be solved by the utility model is to provide a hydraulic press brake with simple structure, large working space and low processing cost.

In order to solve the above problems, the technical solution adopted by the utility model is: a hydraulic press brake, including: a frame, the lower part of the frame is provided with a work table extending forward, the work table is provided with a lower die, and the top of the frame is provided with a The cantilever arm protruding forward, the cantilever arm is located above the work surface and is set opposite to the work surface. A pair of guide rails are arranged on the frame between the cantilever arm and the work surface, and the two guide rails are vertically arranged on the machine. On both sides of the frame, and the guide slots of the two guide rails are set opposite to each other; a bending cylinder is fixed on the beam arm, and the piston rod of the bending cylinder extends downwards from the beam arm and is connected with the large pallet. The bottom of the large pallet There is an upper die, and the two sides of the large carriage are movable and embedded in the guide grooves of the two guide rails respectively. Under the driving action of the bending cylinder, the large carriage can move up and down in the two guide rails, so that the upper die and the lower die are combined. Die or separate.

Further, the aforementioned hydraulic press brake, wherein: the specific connection structure between the two guide rails and the frame is: the two sides of the frame between the cantilever arm and the worktable are respectively provided with mounting blocks extending inwardly, The two mounting blocks are respectively provided with a number of threaded mounting holes, and the two guide rails are correspondingly provided with a number of mounting through holes through the front and back, and the diameter of the mounting through holes is slightly larger than that of the threaded mounting holes. The fastening bolts matched with the threaded mounting holes can fix the guide rail on the mounting block by screwing the fastening bolts through the mounting through holes in the threaded mounting holes; there are several adjusting threads on the frame outside the two guide rails There are matching adjusting bolts in the adjusting threaded holes, and the two guide rails can be respectively supported against the two sides of the large pallet by tightening the adjusting bolts.

Further, the aforementioned hydraulic press brake, wherein: the two guide rails are both V-shaped guide rails.

Further, the aforementioned hydraulic press brake, wherein: the specific connection structure between the worktable and the lower die is: a worktable is arranged on the worktable, the worktable is fixed on the worktable by bolts, and the worktable is A T-shaped slot is provided, and the lower die is fixed on the worktable through T-shaped bolts arranged in the T-shaped slot.

Furthermore, in the aforementioned hydraulic press brake machine, a limit nut for limiting the maximum stroke of retraction of the piston rod is provided on the top of the cylinder of the press brake cylinder.

The beneficial effects of the utility model are: the structure is simple, the requirements for finishing are relatively low, the production cost is effectively reduced, and the gap between the guide rail and the large carriage can be eliminated by adjusting the position of the guide rail, which can not only improve the quality of the bent pipe , but also prolong the service life of the equipment.

Description of drawings

Fig. 1 is a schematic structural view of the hydraulic press brake described in the present invention.

Fig. 2 is a schematic diagram of the structure in the right direction of Fig. 1 .

FIG. 3 is a schematic diagram of the M-M cross-sectional structure in FIG. 1 .

detailed description

The technical scheme described in the utility model will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments.

As shown in Fig. 1 and Fig. 2, the hydraulic press brake includes: a frame 1, the lower part of the frame 1 is provided with a flat work surface 11 extending forward, and a lower die 6 is provided on the work surface 11. In this embodiment, the specific connection structure between the worktable 11 and the lower mold 6 is as follows: a worktable 2 is arranged on the worktable 11, and the worktable 2 is fastened and installed on the worktable 11 by bolts. The plate 2 is provided with a T-shaped slot 21, and the lower mold 6 is fastened and installed on the worktable 2 through the T-shaped bolt 61 arranged in the T-shaped groove 21, and the above-mentioned connection structure is adopted between the lower mold 6 and the worktable 11 , can easily adjust the position of the lower die 2 along the T-shaped groove 21 or replace the lower die 2 of corresponding specifications according to actual processing needs. The top of the frame 1 is provided with a protruding beam arm 12, the beam arm 12 is located above the work surface 11 and is set up and down opposite to the work surface 11, the frame between the beam arm 12 and the work surface 11 A pair of guide rails 13 are arranged on it, and the two guide rails 13 are vertically arranged on both sides of the frame 1 respectively, and the guide notches of the two guide rails 13 are arranged opposite to each other. In this embodiment, the two guide rails 13 are V-shaped guide rails. A bending oil cylinder 3 is fixed on the upper surface of the lifting beam arm 12, and the piston rod 31 of the bending oil cylinder 3 protrudes downward from the lifting beam arm 12 and is connected with the large carriage 4. The bottom of the large carriage 4 is provided with an upper mold 5 , the two sides of the large carriage 4 are respectively movable and embedded in the V-shaped guide grooves of the two guide rails 13, driven by the bending cylinder 3, the large carriage 4 can move up and down in the two guide rails 13, so that the upper mold 5 and the The lower dies 6 are mold-closed or separated from each other. As shown in Fig. 1, Fig. 2 and Fig. 3, in this embodiment, the specific connection structure between the two guide rails 13 and the frame 1 is as follows: Two mounting blocks 14 are respectively provided with several threaded mounting holes 141, and two guide rails 13 are correspondingly provided with several mounting through holes 131 which pass through front and back, and the mounting through holes 131 The aperture is slightly larger than the aperture of the threaded mounting hole 141, and the fastening bolt 132 matched with the threaded mounting hole 141 is arranged in the mounting through hole 131. After the fastening bolt 132 passes through the mounting through hole 131, it is tightened in the threaded mounting hole. 141, the guide rail 13 can be fixed on the mounting block 14; on the frame 1 outside the two guide rails 13, a number of adjusting threaded holes 15 are respectively arranged, and matching adjusting bolts 151 are arranged in the adjusting threaded holes 15, and the adjusting bolts are tightened. 151 can lean against two guide rails 13 respectively on both sides of the large carriage 4, thereby eliminating the gap between the large carriage 4 and the guide rails 13 as much as possible. In this embodiment, a limit nut 32 is provided on the top of the cylinder body of the bending cylinder 3, and the limit nut 32 can limit the maximum retraction of the piston rod 31, thereby preventing the large carriage 4 from being raised too high and Damage to rack.

The usage method of the hydraulic press brake described in the utility model is as follows: put the pipe to be bent into the mold cavity groove of the lower mold 6, start the bending cylinder 3, and push the piston rod 31 of the bending cylinder 3 downward The large carriage 4 moves downward along the two V-shaped guide rails 13 and gradually approaches the lower mold 6 with the upper mold 5 until the upper mold 5 and the lower mold 6 are molded together, thereby bending the pipe. In addition, when the surface of the large carriage 4 or the two V-shaped guide rails 13 is worn, causing the gap between the large carriage 4 and the two V-shaped guide rails 13 to increase, it can be compensated by adjusting the fastening bolt 132 and the adjusting bolt 151 , to eliminate the gap between the large carriage 4 and the V-shaped guide rail 13, ensure that the large carriage 4 is in close contact with the V-shaped guide rail 13, and improve the quality of the pipe bend.

The hydraulic press brake described in the utility model has the following advantages: 1. The structure of the large carriage and the V-shaped guide rail is simple, and the processing accuracy requirements are relatively low, which can effectively reduce the production cost and maintenance cost of the machine itself; 2. If the large When the carriage or the V-shaped guide rail is worn out after long-term use, the gap between the large carriage and the V-shaped guide rail can be eliminated by adjusting the V-shaped guide rail in the four directions of front, rear, left and right, ensuring a large The carriage is in close contact with the V-shaped guide rail, which prolongs the service life of the equipment; 3. The V-shaped guide rail replaces the original four columns, which increases the working space and can meet the bending requirements.

Claims (5)

1. A hydraulic press brake, including: a frame, characterized in that: the lower part of the frame is provided with a forward-extending worktable, the worktable is provided with a lower die, and the top of the frame is provided with a forward-extending beam arm , the cantilever arm is located above the worktable and set opposite to the worktable. A pair of guide rails are arranged on the frame between the cantilever arm and the worktable. The two guide rails are vertically arranged on both sides of the frame, and the two guide rails The guide slots are arranged opposite to each other on the left and right; a bending cylinder is fixed on the beam arm, and the piston rod of the bending cylinder extends downwards from the beam arm and is connected with the large carriage. Both sides of the two guide rails are movably embedded in the guide grooves of the two guide rails. Under the driving action of the bending cylinder, the large carriage can move up and down in the two guide rails, so that the upper mold and the lower mold are mutually closed or separated. 2. The hydraulic press brake according to claim 1, characterized in that: the specific connection structure between the two guide rails and the frame is as follows: the two sides of the frame located between the cantilever arm and the work surface extend inward respectively Mounting blocks are arranged on the ground, and several threaded mounting holes are respectively provided on the two mounting blocks, and several mounting through holes passing through the front and back are correspondingly provided on the two guide rails, and the diameter of the mounting through holes is slightly larger than that of the threaded mounting holes. Fastening bolts matching the threaded mounting holes are arranged in the through holes, and the guide rail can be fixed on the mounting block by tightening the fastening bolts through the mounting through holes in the threaded mounting holes; on the frame outside the two guide rails A number of adjusting threaded holes are arranged respectively, and matching adjusting bolts are arranged in the adjusting threaded holes, and the two guide rails can be respectively supported against the two sides of the large dragging plate by tightening the adjusting bolts. 3. The hydraulic press brake according to claim 1 or 2, wherein the two guide rails are both V-shaped guide rails. 4. The hydraulic press brake according to claim 1 or 2, characterized in that: the specific connection structure between the worktable and the lower die is: a worktable is arranged on the worktable, and the worktable is fixed on the On the working table, a T-shaped slot is arranged on the working table, and the lower mold is fixed on the working table by T-shaped bolts arranged in the T-shaped slot. 5. The hydraulic press brake according to claim 1 or 2, characterized in that: a limit nut for limiting the maximum retraction stroke of the piston rod is arranged on the top of the cylinder body of the press brake cylinder.