Automatic positioning tool for pipe orifice drawing

Abstract

The utility model provides an automatic positioning tool for pipe orifice drawing, which relates to the technical field of pipe orifice drawing tools and comprises a fixing frame for fixing a workpiece, the center of the top edge of the fixing frame is hollowed out, the inner bottom of the fixing frame is fixedly connected with a longitudinally arranged electric telescopic rod, and a spiral seat is mounted at the telescopic end of the electric telescopic rod. A plurality of sets of telescopic mechanisms are inserted into the upper surface of the spiral base, a center inserting column is fixedly connected to the center of the upper surface of the spiral base, and the telescopic mechanisms are arranged to achieve that the multiple combination plates are folded around the center inserting column, so that the multiple combination plates can conveniently penetrate through a preset pipe opening in the surface of a workpiece along with extension of the electric telescopic rods. And a plurality of composition plates are combined to form the drawing die in the workpiece or on the other side through stretching and unfolding of the telescopic mechanism, then the drawing die descends along with contraction of the electric telescopic rod, drawing of the pipe opening is achieved through the pipe opening preset in the surface of the workpiece, the drawing die does not need to be disassembled and assembled repeatedly, and time is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe orifice drawing tooling, in particular to an automatic positioning tooling for pipe orifice drawing. Background Art

[0002] Drawing is a plastic processing method in which an external force acts on the front end of the metal to be drawn, and the metal blank is drawn out from a die hole smaller than the cross-section of the blank to obtain a product with corresponding shape and size. When in use, the pipe to be drawn is placed on a specific tooling, and an external force is used to pull the blank.

[0003] Therefore, a tooling for expanding and drawing metal pipes, with the publication number: CN211803135U, fixes the pipe on the drawing machine body. One end of the drawing mandrel passes through the tail of the pipe and is connected to a hydraulic cylinder arranged inside the drawing machine body. The inner hole expanding die is fixed to the other end of the drawing mandrel through die fixing bolts. When the drawing mandrel is driven by the hydraulic cylinder to move to the right, the pipe can be expanded in diameter.

[0004] However, the drawing mandrel needs to be disassembled and assembled repeatedly during use. That is, every time the diameter is expanded, the drawing mandrel needs to be disassembled and installed once. Disassembling and assembling the drawing mandrel will waste a lot of time, and it is necessary to ensure that the position of the installed drawing mandrel is accurate to prevent the drawing mandrel from shifting during movement and causing the failure of pipe drawing. Content of the Utility Model

[0005] The purpose of the utility model is to solve the problems existing in the prior art, and an automatic positioning tooling for pipe orifice drawing is proposed.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme: The automatic positioning tooling for pipe orifice drawing includes a fixing frame for fixing a workpiece. The top edge center of the fixing frame is hollowed out, and a longitudinally arranged electric telescopic rod is fixedly connected to the inner bottom of the fixing frame. The telescopic end of the electric telescopic rod is provided with a spiral seat. A plurality of sets of telescopic mechanisms are inserted on the upper surface of the spiral seat, and a central insertion column is fixedly connected to the center of the upper surface of the spiral seat. The telescopic mechanism includes two longitudinally arranged sliding strips symmetrically arranged about the central insertion column. The side of the sliding strip facing away from the central insertion column can be detachably connected to connecting arms at both upper and lower positions. An insertion cylinder is sleeved on the upper connecting arm, and both the insertion cylinder and one end of the lower connecting arm are connected to a combined plate through bolts. A plurality of the combined plates are combined to form a drawing die for drawing the pipe orifice of the workpiece. The top and bottom edges of the side of the sliding strip facing the central insertion column are rotatably connected to swing arms. Plug-ins are inserted at corresponding positions of each set of telescopic mechanisms on the central insertion column, and electric push rods are connected between the plug-ins and the top surface of the spiral seat.

[0007] Preferably, a plurality of plug-ins on the central insertion column are cross-distributed, and the electric push rods around the central insertion column are annularly distributed.

[0008] Preferably, a screw is rotatably connected to one side of the top edge of the fixing frame, and baffles are threadedly connected to the screw, which are respectively located on both sides of the hollow part of the top edge of the fixing frame and are sleeved on the other side of the top edge of the fixing frame.

[0009] Preferably, one baffle is threadedly connected to the screw rod, and the other baffle is sleeved on the screw rod and has one side rotatably connected to a nut threadedly connected to the other side of the top edge of the fixing frame.

[0010] Preferably, a connecting block is inserted around the hollowed-out top edge of the inner top surface of the fixing frame, one end of the connecting block faces the center of the hollowed-out top of the fixing frame and is also provided with an electric push rod, and the telescopic end rod of the electric push rod on the connecting block is used to be inserted into the pipe opening of the workpiece.

[0011] Preferably, a columnar protrusion extends downward from the bottom edge of the other end of the connecting block, and a gear ring is rotatably connected to the top surface of the fixing frame, and an end surface of the gear ring is provided with an inclined groove slidably connected to the columnar protrusion of the connecting block.

[0012] Preferably, a spur gear meshing with the gear ring is rotatably connected to a position of the inner top surface of the fixing frame close to one of the inclined grooves.

[0013] Compared with the prior art, the advantages and positive effects of the utility model are:

[0014] 1. In the utility model, a telescopic mechanism is provided to realize the folding of several combined plates around the central plug column, so that the several combined plates can pass through the preset pipe openings on the surface of the workpiece as the electric telescopic rod is extended, and the telescopic mechanism is used to stretch and unfold the several combined plates inside the workpiece or on the other side to realize the combination of the several combined plates to form a drawing die, and then the electric telescopic rod is contracted and descends to pass through the preset pipe openings on the surface of the workpiece to realize the pulling of the pipe openings. That is, this scheme does not need to repeatedly disassemble and assemble the drawing die, saving time, and only uses the telescopic mechanism to fold or unfold several combined plates, so the position can be guaranteed to be stable, and therefore, there will be no pulling failure due to position displacement.

[0015] 2. In the utility model, the electric push rod on the connecting block is extended until the telescopic rod enters the preset pipe opening on the surface of the workpiece, and then the gear ring is reversed to realize that several electric push rods are away from the hollow top of the fixed frame. When the telescopic rods of several electric push rods contact the side wall of the preset pipe opening on the surface of the workpiece at the same time, it means that the central axis of the preset pipe opening of the workpiece coincides with the central axis of the hollow top of the fixed frame 1, that is, coincides with the central axis of the electric telescopic rod 6, which is convenient for realizing the rapid positioning of the relative position of the workpiece and the electric telescopic rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model provides a three-dimensional structural diagram of the automatic positioning tool for pipe mouth drawing;

[0017] Figure 2 The elevation sectional view of the automatic positioning tooling for pipe orifice drawing proposed by the present utility model Figure 1 ;

[0018] Figure 3 The structural schematic diagram of the spiral seat of the automatic positioning tooling for pipe orifice drawing proposed by the present utility model

[0019] Figure 4 is Figure 3 the internal structural schematic diagram of

[0020] Legend: 1. Fixed frame; 2. Baffle; 3. Nut; 4. Screw rod; 5. Electric push rod; 6. Electric telescopic rod; 7. Composite plate; 8. Spiral seat; 9. Connecting block; 10. Tooth ring; 11. Oblique groove; 12. Gear; 13. Insertion cylinder; 14. Central insertion column; 15. Sliding bar; 16. Connecting arm; 17. Plug-in; 18. Swing arm. Detailed implementation manners

[0021] In order to more clearly understand the above objects, features and advantages of the present utility model, the present utility model will be further described below with reference to the drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0022] In the following description, many specific details are set forth to facilitate a thorough understanding of the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Therefore, the present utility model is not limited by the specific embodiments disclosed in the following specification.

[0023] Such as Figures 1-4As shown in the figure, the automatic positioning tooling for pipe orifice drawing includes a fixing frame 1 for fixing the workpiece. The center of the top edge of the fixing frame 1 is hollowed out, and a longitudinally arranged electric telescopic rod 6 is fixedly connected to the inner bottom of the fixing frame 1. A spiral seat 8 is installed at the telescopic end of the electric telescopic rod 6. The spiral seat 8 is threadedly connected to the telescopic end of the electric telescopic rod 6. And in order to ensure the tight connection, bolts can also be selected to penetrate the spiral seat 8 and the telescopic end of the electric telescopic rod 6. A number of telescopic mechanisms are inserted on the upper surface of the spiral seat 8, and a central insertion post 14 is fixedly connected to the center of the upper surface of the spiral seat 8. The telescopic mechanism includes two longitudinally arranged sliding bars 15 symmetrically arranged with respect to the central insertion post 14. A number of telescopic mechanisms alternate in extension and contraction, that is, they do not move simultaneously. Connecting arms 16 can be detachably connected to the upper and lower positions on the side of the sliding bar 15 facing away from the central insertion post 14. An insertion cylinder 13 is sleeved on the connecting arm 16 at the upper position, and a combined plate 7 is connected to one end of the insertion cylinder 13 and the connecting arm 16 at the lower position by bolts. Between the insertion cylinder 13 and the connecting arm 16 at the upper position, the fixing can also be selected by using bolts, or the distance between the insertion cylinder 13 and the central insertion post 14 can be adjusted to facilitate the installation of combined plates 7 with different arcs. A number of combined plates 7 are combined to form a drawing die for pipe orifice drawing of the workpiece, such as Figure 3 As shown in the figure, when a number of combined plates 7 are distributed in a circular array, they are spliced into a complete ring, and the arc surface on the outer wall of the combined plate 7 is used to realize the drawing of the pipe orifice. Swing arms 18 are rotatably connected to the top and bottom positions on the side of the sliding bar 15 facing the central insertion post 14. Plug-ins 17 are inserted at the positions corresponding to each telescopic mechanism on the central insertion post 14. An electric push rod 5 is connected between the plug-in 17 and the top surface of the spiral seat 8. A number of plug-ins 17 on the central insertion post 14 are cross-distributed, and the electric push rods 5 around the central insertion post 14 are circularly distributed, such as Figure 4 As shown in the figure, the cross-distribution ensures that when one set of plug-ins 17 is lifted and lowered along the surface of the central insertion post 14 under the telescopic action of the electric push rod 5, it will not be interfered. The additionally provided swing arms 18 can push the sliding bar 15 away from the central insertion post 14 when the plug-in 17 rises, and pull the sliding bar 15 close to the central insertion post 14 when it descends, that is, the combined plate 7 installed on this set of telescopic mechanisms is folded around the central insertion post 14. Ensure that when the electric telescopic rod 6 extends, it drives a number of folded combined plates 7 to enter along the preset pipe orifice, and then a number of combined plates 7 move and open alternately, and are combined into such as Figure 3 As shown in the figure, along with the contraction of the electric telescopic rod 6, a number of combined plates 7 pass through the preset pipe orifice and draw the pipe orifice.

[0024] In addition: One side of the top edge of the fixing frame 1 is rotatably connected to a screw rod 4. A baffle 2 is threadedly connected to the screw rod 4 and is located on both sides of the hollow part of the top edge of the fixing frame 1 and sleeved on the other side of the top edge of the fixing frame 1. One of the baffles 2 is threadedly connected to the screw rod 4, and the other baffle 2 is sleeved on the screw rod 4 and is rotatably connected to a nut 3 threadedly connected to the other side of the top edge of the fixing frame 1 on one side. During use, according to the preset port on the workpiece and the length of one side, the nut 3 is rotated to adjust the distance between the corresponding baffle 2 and the central axis of the hollow part at the top of the fixing frame 1 to be equal to the distance of one side of the workpiece, so as to ensure that the workpiece is aligned when placed. Then, at the other end, the other baffle 2 is moved to clamp the other side of the workpiece by installing a servo motor on the fixing frame 1 to drive the screw rod 4 to rotate.

[0025] In addition: Connecting blocks 9 are inserted around the hollow part at the top edge on the inner top surface of the fixing frame 1. One end of the connecting block 9 faces the center of the hollow part of the fixing frame 1 and is also provided with an electric push rod 5. The telescopic end rod of the electric push rod 5 on the connecting block 9 is used to insert into the pipe orifice of the workpiece. A columnar protrusion extends downward from the bottom edge of the other end of the connecting block 9. A toothed ring 10 is rotatably connected to the inner top surface of the fixing frame 1. An inclined groove 11 for sliding connection with the columnar protrusion of the connecting block 9 is provided on the end face of the toothed ring 10. A spur gear 12 meshing with the toothed ring 10 is rotatably connected to the inner top surface of the fixing frame 1 near one of the inclined grooves 11. Similarly, a servo motor can be installed on the inner top surface of the fixing frame 1 to drive the spur gear 12 to rotate, thereby realizing the counterclockwise rotation of the meshing toothed ring 10 to drive the inclined groove 11 to rotate. By using the contact between the inclined groove 11 and the columnar protrusion part of the other end of the connecting block 9, the electric push rod 5 at one end of the connecting block 9 is made to approach the central axis of the hollow part at the top of the fixing frame 1. Then, the electric push rod 5 on the connecting block 9 is extended until the telescopic rod enters the preset pipe orifice on the surface of the workpiece. Then, when the toothed ring 10 rotates in reverse, several electric push rods 5 can be made to move away from the hollow part at the top of the fixing frame 1. When the telescopic rods of several electric push rods 5 contact the side wall of the preset pipe orifice on the surface of the workpiece at the same time, it means that the central axis of the preset pipe orifice of the workpiece coincides with the central axis of the hollow part at the top of the fixing frame 1, that is, coincides with the central axis of the electric telescopic rod 6, which is convenient for quickly positioning the relative position of the workpiece and the electric telescopic rod 6. And as Figure 1 shown, the electric push rod 5 on the connecting block 9 is embedded in the side wall of the hollow part. Therefore, when pulling the pipe orifice, the electric push rod 5 on the connecting block 9 contracts and disengages from the pipe orifice of the workpiece and is embedded in the inner side wall of the hollow part, which will not affect the operation of the composite plate 7.

[0026] The working principle is as follows: First, control several connecting blocks 9 to drive the electric push rods 5 at their endpoints to move closer together. Place the workpiece above the fixing frame 1, and the pipe orifice is sleeved on the telescopic ends of the electric push rods 5 on several connecting blocks 9. Use the reverse movement of several connecting blocks 9 to drive the electric push rods 5 at the endpoints to move, so as to align the preset pipe orifice on the workpiece with the hollow part at the top of the fixing frame 1. Then, use two baffles 2 to clamp and fit the two sides of the workpiece to fix its position. Use the contraction of the electric push rod 5 on the screw base 8 to lower the plug-in 17, and then make several telescopic mechanisms contract alternately to make the combined plates 7 move closer to the central plug 14, so as to make the several combined plates 7 in the retracted state pass through the preset pipe orifice on the surface of the workpiece under the extension action of the electric telescopic rod 6. Then, several telescopic mechanisms expand alternately to make several combined plates 7 form a complete rotary drawing die shape. As the electric telescopic rod 6 contracts and passes through the workpiece pipe orifice, drawing is achieved.

[0027] The wiring diagrams of the electric push rod 5, the electric telescopic rod 6 and the motor in the present utility model belong to the common knowledge in the art. Their working principles are already known technologies, and their models are selected according to actual use. Therefore, the control methods and wiring arrangements of the electric push rod 5, the electric telescopic rod 6 and the motor will not be explained in detail.

[0028] The above is only the preferred embodiment of the present utility model, and it is not a limitation of the present utility model in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present utility model, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model still fall within the protection scope of the technical solution of the present utility model.

Claims

1. Automatic positioning tool for pipe mouth drawing, characterized by: The invention comprises a fixing frame (1) for fixing a workpiece, wherein the center of the top edge of the fixing frame (1) is hollowed out and a longitudinally arranged electric telescopic rod (6) is fixedly connected to the bottom of the fixing frame (1), a spiral seat (8) is installed at the telescopic end of the electric telescopic rod (6), a plurality of groups of telescopic mechanisms are plugged into the upper surface of the spiral seat (8), and a central plug post (14) is fixedly connected to the center of the upper surface of the spiral seat (8), the telescopic mechanism comprises two sliding bars (15) symmetrically arranged with respect to the central plug post (14) and arranged longitudinally, and the sliding bar (15) is detachably connected to a side facing away from the central plug post (14) at both upper and lower positions. A connecting arm (16), an insert tube (13) is sleeved on the connecting arm (16) at the upper position, and the insert tube (13) and one end of the connecting arm (16) at the lower position are both connected to a combination plate (7) by bolts, and a plurality of the combination plates (7) are combined to form a drawing die for drawing the pipe mouth of a workpiece, and the top and bottom edges of the sliding bar (15) facing the central plug column (14) are both rotatably connected to a swing arm (18), and the position of each group of telescopic mechanisms on the central plug column (14) is plugged with a plug-in (17), and an electric push rod (5) is connected between the plug-in (17) and the top surface of the spiral seat (8).

2. The automatic positioning tool for pipe orifice drawing according to claim 1 is characterized in that: The plurality of plug-ins (17) on the central plug post (14) are cross-distributed, and the electric push rods (5) around the central plug post (14) are annularly distributed.

3. The automatic positioning tool for pipe orifice drawing according to claim 1 is characterized in that: One side of the top edge of the fixing frame (1) is rotatably connected to a screw rod (4), and the screw rod (4) is threadedly connected to baffles (2) respectively located on both sides of the hollowed-out portion of the top edge of the fixing frame (1) and sleeved on the other side of the top edge of the fixing frame (1).

4. The automatic positioning tool for pipe orifice drawing according to claim 3 is characterized in that: One of the baffles (2) is threadedly connected to the screw rod (4), and the other baffle (2) is sleeved with the screw rod (4) and rotatably connected to a nut (3) threadedly connected to the other side of the top edge of the fixing frame (1).

5. The automatic positioning tool for pipe orifice drawing according to claim 1 is characterized in that: A connecting block (9) is inserted around the hollowed-out portion of the top edge of the inner top surface of the fixing frame (1), one end of the connecting block (9) faces the center of the hollowed-out portion of the fixing frame (1) and is also provided with an electric push rod (5), and the telescopic end rod of the electric push rod (5) on the connecting block (9) is used to be inserted into the pipe opening of the workpiece.

6. The automatic positioning tool for pipe orifice drawing according to claim 5 is characterized in that: A columnar protrusion extends downward from the bottom edge of the other end of the connecting block (9), and a gear ring (10) is rotatably connected to the inner top surface of the fixing frame (1). The end surface of the gear ring (10) is provided with an inclined groove (11) that is slidably connected to the columnar protrusion of the connecting block (9).

7. The automatic positioning tool for pipe orifice drawing according to claim 6 is characterized in that: A spur gear (12) meshingly connected to the gear ring (10) is rotatably connected to a position of the inner top surface of the fixing frame (1) close to one of the inclined grooves (11).

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