Positioning mechanism of electric hydraulic machine

Abstract

The utility model provides a positioning mechanism of an electric hydraulic machine, and belongs to the technical field of hydraulic machines. Comprising a cushion block used for being installed on an installation table of the hydraulic machine, an installation frame is arranged on the cushion block, an installation cavity used for containing a workpiece is formed in the installation frame, and a plurality of limiting plates used for making contact with the side wall of the workpiece to limit movement of the workpiece are arranged in the installation cavity in the circumferential direction of the installation frame. The limiting plates are horizontally and linearly arranged on the mounting frame in a sliding mode in the direction perpendicular to the plate faces of the limiting plates, and a plurality of driving pieces used for driving the limiting plates to move in a one-to-one correspondence mode are arranged on the mounting frame. According to the positioning mechanism of the electric hydraulic machine, when the stamping head presses a workpiece downwards, the workpiece can be limited to slide and deviate through the limiting plate, and the effect of improving the workpiece machining stability is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic presses, in particular to a positioning mechanism of an electric hydraulic press. Background Art

[0002] A hydraulic press is a machine that uses the static pressure of liquid to process metal, plastic, rubber, wood, powder and other products. It is commonly used in pressing and forming processes such as forging, stamping, cold extrusion, straightening, bending, turning, sheet metal stretching, powder metallurgy, press fitting, etc.

[0003] In modern industry, many factories use electrohydraulic presses to process workpieces. These presses consist of a hydraulic press body, a punch head, and a mounting platform. The mounting platform is mounted on one side of the hydraulic press body, and the punch head slides vertically on the body, above the mounting platform. To process a workpiece, workers first place a pad on the mounting platform, then place the workpiece onto the pad. The hydraulic press body is then activated, causing the punch head to press down on the workpiece, causing it to deform.

[0004] During the processing, workpieces with uneven outer walls are prone to slip and deflect due to uneven force when subjected to the pressure of the punch head. Therefore, it is necessary to provide a positioning mechanism for an electric hydraulic press. Utility Model Content

[0005] In view of the above problems, the utility model provides a positioning mechanism for an electric hydraulic press.

[0006] In order to achieve the above-mentioned purpose of the invention, the technical solution adopted by the present invention is as follows:

[0007] A positioning mechanism for an electric hydraulic press is provided, comprising a pad for installation on a mounting platform of the hydraulic press, a mounting frame being provided on the pad, a mounting cavity for accommodating a workpiece being provided in the mounting frame, a plurality of limit plates for contacting the side walls of the workpiece to limit its movement being provided in the mounting cavity along the circumference of the mounting frame, the limit plates being arranged on the mounting frame for horizontal linear sliding along a direction perpendicular to their own plate surfaces, and a plurality of driving members for corresponding one to one and driving the limit plates to move being provided on the mounting frame.

[0008] Furthermore, the limit plate is movably provided with a plurality of positioning blocks for cooperating with the limit plate to abut against the outer wall of the workpiece. The side of the limit plate for contacting the workpiece is provided with a plurality of positioning grooves for accommodating the positioning blocks. The plurality of positioning blocks correspond one to one and are slidably arranged in the positioning groove along the depth direction of the positioning groove, and a first spring is provided in the positioning groove for driving one end of the positioning block to move out of the positioning groove.

[0009] Furthermore, the driving member includes a screw, and a threaded hole with a size matching the screw is opened on the side wall of the mounting frame. The screw is threadedly connected in the threaded hole. One end of the screw passes into the mounting cavity and is rotatably connected to the limit plate, and the other end of the screw is fixedly connected to a handle.

[0010] Furthermore, the mounting frame includes two fixed plates parallel to each other and a door panel arranged between the two fixed plates. Four screws are provided, and the four screws are respectively arranged on the corresponding fixed plates / door panels. The two fixed plates are vertically arranged on the pads. A transport channel for long workpieces to pass through is formed between the two fixed plates. The door panel is rotatably arranged on one of the fixed plates, and the movable end of the door panel is movably connected to the other fixed plate. The door panel is provided with a first limit member for limiting its own rotation relative to the fixed plate.

[0011] Furthermore, the first limiting member includes a latch, and a protrusion is provided at the movable end of the door panel above the corresponding fixed plate. A through hole with an inner diameter matching the latch is vertically penetrated through the protrusion, and a groove for plugging with the latch is provided on the top of the fixed plate. The latch vertically passes through the through hole and is plugged into the groove.

[0012] Furthermore, the pad is detachably connected to the mounting table of the hydraulic press, the fixed plate is vertically movably arranged on the pad, a plurality of guide rods are vertically fixed to the bottom of the fixed plate, and a plurality of guide grooves for plugging and cooperating with the guide rods are opened on the top of the pad.

[0013] Furthermore, the guide rod is provided with a second limit member for limiting its vertical movement relative to the pad. The second limit member includes a limit column. A mounting groove for accommodating the limit column is horizontally opened on the outer wall of the guide rod. A limit hole for communicating with the mounting groove is opened on the inner wall of the guide groove. The limit column is slidably arranged in the mounting groove along the depth direction of the mounting groove. A second spring is provided in the mounting groove for driving the limit column to slide and be inserted into the limit hole.

[0014] The beneficial effects of the present invention are as follows: the staff can place the workpiece to be processed into the installation cavity, and then move the limit plate through the driving part so that multiple limit plates can contact the outer wall of the workpiece together. When the punch head presses down the workpiece, the limit plate can limit the slippage and displacement of the workpiece, which has the effect of improving the stability of workpiece processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of a positioning mechanism of an electric hydraulic press according to an embodiment of the present application.

[0016] Figure 2 This is a structural schematic diagram of a positioning block of a positioning mechanism of an electric hydraulic press according to an embodiment of the present application.

[0017] Figure 3This is a schematic diagram of the working of a positioning mechanism of an electric hydraulic press used to process a long workpiece in an embodiment of the present application.

[0018] Figure 4 This is a schematic diagram of the exploded view of a guide rod and a pad of a positioning mechanism of an electric hydraulic press according to an embodiment of the present application.

[0019] Among them, 1. Hydraulic press body; 11. Punching head; 12. Mounting table; 2. Pad; 21. Guide groove; 22. Limiting hole; 3. Mounting frame; 31. Fixing plate; 311. Groove; 32. Door panel; 321. Through hole; 4. Limiting plate; 41. Positioning groove; 5. Driving member; 6. Positioning block; 7. First spring; 8. First limiting member; 9. Guide rod; 10. Second limiting member; 20. Second spring. DETAILED DESCRIPTION

[0020] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0021] The present application discloses a positioning mechanism for an electric hydraulic press, referring to Figure 1 、 Figure 2 and Figure 3 The hydraulic press comprises a spacer block 2 for mounting on a mounting platform 12 of a hydraulic press. A mounting frame 3 is provided on the spacer block 2, and a mounting cavity for accommodating a workpiece is defined within the mounting frame 3. Within the mounting cavity, a plurality of limit plates 4 are arranged along the circumference of the mounting frame 3 to contact the sidewalls of the workpiece to restrict its movement. The limit plates 4 are mounted on the mounting frame 3 for horizontal linear sliding in a direction perpendicular to their respective surfaces. The mounting frame 3 is provided with a plurality of driving members 5 for correspondingly driving and moving the limit plates 4.

[0022] The electric hydraulic press comprises a main body 1, a punch head 11, and a mounting platform 12. In this embodiment, a spacer block 2 is mounted on the mounting platform 12, positioned below the punch head 11. A worker places the workpiece to be processed into the mounting cavity and then uses a driver 5 to move the limit plates 4 so that multiple limit plates 4 contact the outer wall of the workpiece. As the punch head 11 presses down on the workpiece, the limit plates 4 limit any slippage or misalignment of the workpiece, improving machining stability.

[0023] Furthermore, a plurality of positioning blocks 6 are movably provided on the limiting plate 4 for cooperating with the limiting plate 4 to abut against the outer wall of the workpiece. A plurality of positioning grooves 41 for accommodating the positioning blocks 6 are provided on a side of the limiting plate 4 for contacting the workpiece. The plurality of positioning blocks 6 correspond one to one and are slidably arranged in the positioning groove 41 along the depth direction of the positioning groove 41, and a first spring 7 is installed in the positioning groove 41 for driving one end of the positioning block 6 to move out of the positioning groove 41.

[0024] In the actual production process, the outer walls of some workpieces are often uneven. In the embodiment of the present application, when the limit plate 4 contacts the uneven outer wall of the workpiece, the positioning block 6 can also abut against the corresponding outer wall of the workpiece, further increasing the stability of the workpiece during the processing.

[0025] Specifically, the drive member 5 comprises a screw. A threaded hole of suitable size is provided in the side wall of the mounting frame 3. The screw is threadedly engaged within the threaded hole. One end of the screw passes into the mounting cavity and is rotatably connected to the stop plate 4. The other end of the screw is welded to a handle. Turning the handle causes the corresponding stop plate 4 to move to contact the outer wall of the workpiece.

[0026] Specifically, the mounting frame 3 comprises two parallel fixed plates 31 and a door panel 32 disposed between the two fixed plates 31. Four screws are provided, each mounted on a corresponding fixed plate 31 / door panel 32. The two fixed plates 31 are vertically mounted on the spacer 2, with a transport channel formed between the two fixed plates 31 for elongated workpieces to pass through. The door panel 32 is pivotally mounted on one of the fixed plates 31, with its movable end movably connected to the other fixed plate 31. A first stopper 8 is also mounted on the door panel 32 to limit its rotation relative to the fixed plate 31.

[0027] When processing a partially long workpiece, the worker can rotate and open the two door panels 32 and then place the long workpiece in the transport channel so that the punch head 11 can process it.

[0028] Specifically, the first stopper 8 comprises a latch. A protrusion is integrally fixed to the movable end of the door panel 32 above the corresponding fixed plate 31. A through-hole 321 with an inner diameter matching the latch is vertically penetrated through the protrusion. A groove 311 is defined at the top of the fixed plate 31 for engaging with the latch. The latch passes vertically through the through-hole 321 and then engages with the groove 311. The operator can rotate and open the door panel 32 by pulling out the latch.

[0029] Reference Figure 4 The pad 2 is detachably connected to the mounting platform 12 of the hydraulic press, and the fixed plate 31 is vertically movably arranged on the pad 2. A plurality of guide rods 9 are vertically welded and fixed to the bottom of the fixed plate 31, and a plurality of guide grooves 21 for one-to-one plugging and matching with the guide rods 9 are provided on the top of the pad 2.

[0030] The top of the pad 2 will wear out after long-term use. In the embodiment of the present application, the pad 2 is connected to the mounting platform 12 by bolts. The operator can move the fixing plate 31 upward to separate the mounting frame 3 and the guide rod 9 from the pad 2 as a whole, then turn the bolts and remove the pad 2, so that the top of the pad 2 can be repaired regularly or replaced with a new pad 2.

[0031] Furthermore, a second limiting member 10 is mounted on the guide rod 9 to limit its vertical movement relative to the pad 2. The second limiting member 10 includes a limiting post. A mounting groove for accommodating the limiting post is horizontally formed on the outer wall of the guide rod 9. A limiting hole 22 for communicating with the mounting groove is formed on the inner wall of the guide groove 21. The limiting post is slidably disposed within the mounting groove along the depth direction of the mounting groove. A second spring 20 is mounted within the mounting groove to drive the limiting post to slide and insert into the limiting hole 22.

[0032] In the embodiment of the present application, the limiting post is inserted into the mounting hole to limit the vertical movement of the guide rod 9, further improving the installation stability of the fixing plate 31 on the cushion block 2. The staff presses the limiting post into the mounting groove to vertically move the fixing plate 31 and separate it from the cushion block 2.

[0033] The principle of the positioning mechanism of an electric hydraulic press according to the present embodiment is as follows: a worker places the workpiece to be processed into the mounting cavity, and then uses a driver 5 to move the limiting plates 4 so that multiple limiting plates 4 can contact the outer wall of the workpiece. When the punch head 11 presses down on the workpiece, the limiting plates 4 can limit the workpiece from sliding and deflecting, thereby improving the stability of the workpiece during processing.

[0034] Those skilled in the art will appreciate that, although preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they become aware of the underlying inventive concepts. Therefore, the appended claims are intended to be interpreted as encompassing the preferred embodiments and all changes and modifications that fall within the scope of the present invention. Clearly, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, the present invention is intended to encompass such changes and modifications as fall within the scope of the claims and their equivalents.

Claims

1. A positioning mechanism for an electric hydraulic press, characterized in that: The invention comprises a pad (2) for being mounted on a mounting platform (12) of a hydraulic press, wherein a mounting frame (3) is provided on the pad (2), a mounting cavity for accommodating a workpiece is provided in the mounting frame (3), a plurality of limit plates (4) for contacting the side wall of the workpiece to limit its movement are provided in the mounting cavity along the circumference of the mounting frame (3), the limit plates (4) are horizontally and linearly slidably arranged on the mounting frame (3) in a direction perpendicular to their own plate surfaces, and a plurality of driving members (5) for corresponding one to one and driving the limit plates (4) to move are provided on the mounting frame (3).

2. The positioning mechanism of an electro-hydraulic press according to claim 1, characterized in that: The limiting plate (4) is movably provided with a plurality of positioning blocks (6) for cooperating with the limiting plate (4) to abut against the outer wall of the workpiece. The limiting plate (4) is provided with a plurality of positioning grooves (41) for accommodating the positioning blocks (6) on a side for contacting the workpiece. The plurality of positioning blocks (6) are arranged in a one-to-one correspondence and are slidably arranged in the positioning groove (41) along the depth direction of the positioning groove (41). A first spring (7) is provided in the positioning groove (41) for driving one end of the positioning block (6) to move out of the positioning groove (41).

3. The positioning mechanism of an electro-hydraulic press according to claim 1, characterized in that: The driving member (5) includes a screw rod, and a threaded hole with a size matching that of the screw rod is provided on the side wall of the mounting frame (3). The screw rod is threadedly connected in the threaded hole. One end of the screw rod passes into the mounting cavity and is rotatably connected to the limiting plate (4), and the other end of the screw rod is fixedly connected to a handle.

4. The positioning mechanism of an electro-hydraulic press according to claim 3, characterized in that: The mounting frame (3) comprises two fixed plates (31) parallel to each other and a door plate (32) arranged between the two fixed plates (31); four screws are provided, and the four screws are respectively arranged on the corresponding fixed plates (31) / door plates (32); the two fixed plates (31) are vertically arranged on the cushion block (2); a transport channel for allowing long workpieces to pass through is formed between the two fixed plates (31); the door plate (32) is rotatably arranged on one of the fixed plates (31), and the movable end of the door plate (32) is movably connected to the other fixed plate (31); and a first limiting member (8) is provided on the door plate (32) for limiting its own rotation relative to the fixed plate (31).

5. The positioning mechanism of an electro-hydraulic press according to claim 4, characterized in that: The first limiting member (8) includes a latch, and a protrusion is provided on the movable end of the door panel (32) above the corresponding fixed plate (31). A through hole (321) with an inner diameter matching the latch is vertically penetrated through the protrusion, and a groove (311) for plugging with the latch is provided on the top of the fixed plate (31), and the latch vertically passes through the through hole (321) and is plugged into the groove (311).

6. The positioning mechanism of an electro-hydraulic press according to claim 4, characterized in that: The cushion block (2) is detachably connected to the mounting platform (12) of the hydraulic press, the fixed plate (31) is vertically movably arranged on the cushion block (2), a plurality of guide rods (9) are vertically fixed to the bottom of the fixed plate (31), and a plurality of guide grooves (21) for plugging and matching with the guide rods (9) are opened on the top of the cushion block (2).

7. The positioning mechanism of an electro-hydraulic press according to claim 6, characterized in that: The guide rod (9) is provided with a second limiting member (10) for limiting its vertical movement relative to the pad (2), and the second limiting member (10) includes a limiting column. A mounting groove for accommodating the limiting column is horizontally opened on the outer wall of the guide rod (9), and a limiting hole (22) for communicating with the mounting groove is opened on the inner wall of the guide groove (21). The limiting column is slidably arranged in the mounting groove along the depth direction of the mounting groove, and a second spring (20) is provided in the mounting groove for driving the limiting column to slide and be inserted into the limiting hole (22).

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