Structure for accurately applying pre-tightening force to large stand column

Abstract

The utility model discloses a structure for accurately applying pre-tightening force to a large stand column, and belongs to the technical field of pressing machines. The structure comprises a main body and a supporting mechanism, the main body comprises a machine base, round grooves are formed in the four corners of the upper end of the machine base, through holes are formed in the centers of the interiors of the four round grooves, stand columns are arranged in the four through holes, and the portions, located at the upper end of the machine base, of the four stand columns are sleeved with base plates; the base plate is arranged in the circular groove, external threads are arranged at the positions, close to the upper ends, of the exteriors of the four stand columns, locking nuts are connected to the positions, close to the upper ends, of the exteriors of the four stand columns in a threaded mode, a plurality of threaded holes are formed in the locking nuts, and jacking screws are connected to the interiors of the threaded holes in a threaded mode; the pre-tightening force of the jacking screws can be effectively and accurately controlled through the torque wrench, so that the pre-tightening force of the stand column is accurately controlled, and the pre-tightening force of the stand column is high in practical value.

Description

TECHNICAL FIELD

[0001] The utility model relates to a press technical field, concretely is a structure for large -scale column accurate pre -tightening force is added. BACKGROUND

[0002] The press is the short name of pressure machine, hydraulic press, oil press, and the press refers to the forming machinery for the industrial products through the pressure forming, generally adopts the hydraulic cylinder, therefore is also called the oil press. The column on both sides of the press is called "column". The press column is the main component on the pressure machine, and its main role includes supporting the upper beam and the cylinder, bearing the working tension, and guiding the movable cross beam. The column needs to apply pre-tightening force when installing to prevent the equipment from loosening during work, and sometimes the pre-tightening force needs to offset the tension generated during work. Different pre-tightening forces need to be applied according to the size of the column and the application occasion.

[0003] Based on the above, the present inventors found that the following problems exist: At present, the pre-tightening force of the column is generally applied by heating the column, making it extend by heating, tightening the locking nut, and generating a certain pre-tightening force after the column cools and shrinks, but heating can change the internal crystal image organization of the column, especially when a larger pre-tightening force needs to be applied, the heating temperature requirement is higher, which destroys the mechanical properties of the column, and it is not convenient to accurately control the pre-tightening force.

[0004] Therefore, in view of the above, the present structure and defects are improved, and a structure for accurately applying pre-tightening force to a large column is provided, so as to achieve the purpose of having more practical value. INVENTION CONTENTS

[0005] The utility model aims at providing a structure for accurately applying pre-tightening force to a large column to solve the problems raised in the background art.

[0006] In view of the above problems, the technical scheme provided by the utility model is:

[0007] A structure for accurately applying pre-tightening force to a large column, comprising a main body and a supporting mechanism, the main body comprising a base, a circular groove is formed at the upper end of each corner of the base, a through hole is formed at the inner center of each of the four circular grooves, a column is arranged inside each of the four through holes, a pad is arranged outside each of the four columns at the upper end of the base, an external thread is arranged at the outer portion of each of the four columns near the upper end, a locking nut is threadedly connected to the external thread of each of the four columns near the upper end, a plurality of threaded holes are formed in the locking nut, a jacking screw is threadedly connected to the inside of each of the plurality of threaded holes, and the bottom end of each of the plurality of jacking screws is in abutting contact with the upper end of the pad.

[0008] The beneficial effects of the above further scheme are that the circular grooves at the four corners of the upper end of the base and the through holes in the center of the circular grooves facilitate the installation between the base and the columns, the pad plate with hardness comparable to the jacking screw is added between the base and the jacking screw to protect the base, the locking nuts are threadedly connected to the outside of the four columns near the upper end to fix the columns on the base through the locking nuts, a plurality of threaded holes are formed in the locking nuts to facilitate the installation between the jacking screw and the locking nut, the jacking screw is arranged to facilitate the adjustment of the working load of the jacking screw when the jacking screw rotates, the jacking screw is tightened according to the predetermined tightening sequence by the torque wrench to apply a rated pre-tightening force on the column, the jacking screw directly pulls the column to generate a large pre-tightening force, the pre-tightening force of the jacking screw can be accurately controlled by the torque wrench, and therefore the pre-tightening force of the column is also accurately controlled.

[0009] Further, the plurality of threaded holes and the plurality of jacking screws are evenly distributed in a ring shape.

[0010] The beneficial effects of the above further scheme are that the plurality of threaded holes and the plurality of jacking screws are arranged in an evenly distributed ring shape, so that the plurality of jacking screws are uniformly stressed.

[0011] Further, the upper end surface of the base is connected with a press, the movable end of the press extends to the outside through the base, and is connected with a pressing plate, the bottom ends of the four columns extend to the outside through the pressing plate, and are in gap cooperation with the through holes of the pressing plate.

[0012] The beneficial effects of the above further scheme are that the press and the pressing plate are used in cooperation, when the press works, the movable end of the press drives the pressing plate to move upward or downward, since the bottom ends of the four columns extend through the pressing plate and are in gap cooperation with the through holes of the pressing plate, the pressing plate is stably moved upward or downward on the four columns.

[0013] Further, the four columns are connected with a placement table between the outsides near the bottom ends, and the placement table is located below the pressing plate.

[0014] The beneficial effects of the above further scheme are that the placement table is arranged below the pressing plate, the workpiece to be pressed is placed on the placement table, when the pressing plate is pressed downward, a strong pressure is applied to the workpiece to be pressed to cause plastic deformation and fracture of the workpiece to be pressed, so that the workpiece to be pressed is processed into a required part or product.

[0015] Further, the support mechanism comprises a base, the upper end surface of the base is connected with the bottom ends of the four columns at four corners respectively, and the outsides of the base are connected with a pair of reinforcing members on both sides.

[0016] The beneficial effect of the further scheme is that the base supports the columns, the reinforcing pieces increase the structural strength of the base, thereby improving the stability and load-bearing capacity of the base.

[0017] Further, screw holes are formed at the inner bottom end centers of the two pairs of reinforcing pieces.

[0018] The beneficial effect of the further scheme is that the screw holes are formed at the inner bottom end centers of the reinforcing pieces, and the reinforcing pieces are fixed to the base or other structures by screwing the bolts to the screw holes, thereby preventing the base from loosening.

[0019] Compared with the prior art, the beneficial effect of the structure for precisely applying pre-tightening force to large columns is that: the circular grooves are formed at the upper end corners of the machine base, and the through holes are formed at the centers of the circular grooves, thereby facilitating the installation between the machine base and the columns; the pad plates with hardnesses equivalent to that of the jacking screws are arranged between the machine base and the jacking screws, thereby protecting the machine base; the locking nuts are threadedly connected to the outer portions of the four columns close to the upper ends, thereby fixing the columns to the machine base by the locking nuts; the screw holes are formed in the locking nuts, thereby facilitating the installation between the jacking screws and the locking nuts; the jacking screws are arranged, and the working load of the jacking screws is adjusted by rotating the jacking screws; the jacking screws are tightened by the torque wrench according to the predetermined tightening sequence, and the rated pre-tightening force is applied to the columns; since the screw holes in the jacking screws and the locking nuts are tightly matched, the movement of the locking nuts drives the columns to move upward or downward; the jacking screws are rotated to directly pull the columns upward, so that a large pre-tightening force is generated in the columns; the pre-tightening force of the jacking screws is accurately controlled by the torque wrench, so that the pre-tightening force of the columns is also accurately controlled. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The utility model provides a kind of for the stereoscopic structure schematic diagram of structure for large column precise pre-tightening force applied to it;

[0021] Figure 2 The utility model provides a kind of for the explosion stereoscopic structure schematic diagram of structure for large column precise pre-tightening force applied to it;

[0022] Figure 3 The utility model provides a kind of for the structure of structure for large column precise pre-tightening force applied to it; Figure 2 The enlarged schematic view of structure A in it.

[0023] In the figure: 100, main body; 1001, base; 1002, round groove; 1003, column; 1004, pad plate; 1005, locking nut; 1006, threaded hole; 1007, jacking screw; 1008, press; 1009, pressing plate; 1010, placing table; 200, supporting mechanism; 2001, base; 2002, reinforcing piece. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0025] Please refer to Figures 1-3The utility model provides a technical scheme: a structure for precisely exerting pre -tightening force for large -scale stand, including main part 100 and support mechanism 200, main part 100 includes bed 1001, and the upper end four corners of bed 1001 all are established with round groove 1002, and the inside center of four round grooves 1002 all are established with through -hole, and the inside of four through -holes all are equipped with stand 1003, and four stands 1003 are all equipped with the backing plate 1004 in the outside of the upper end of bed 1001, and the backing plate 1004 is set up in the inside of round groove 1002, and the outside of four stands 1003 is close to the upper end place all is equipped with external thread, and the outside of four stands 1003 is close to the upper end place all is connected with lock nut 1005, and lock nut 1005 all are established with a plurality of threaded holes 1006, and a plurality of threaded holes 1006's inside all are connected with the jacking screw rod 1007 of screw thread, and the bottom of a plurality of jacking screw rods 1007 all and the upper end of backing plate 1004 abut and fit, through the establishment round groove 1002 in the upper end four corners of bed 1001, and the through -hole establishment in the center of round groove 1002, the installation between bed 1001 and stand 1003 is convenient, through increasing the backing plate 1004 of the hardness of jacking screw rod 1007 in bed 1001 and jacking screw rod 1007, can protect bed 1001, through the threaded connection lock nut 1005 in the outside of four stands 1003 and close to the upper end place, to fix stand 1003 on bed 1001 through lock nut 1005, through the establishment a plurality of threaded holes 1006 on lock nut 1005, to facilitate the installation between jacking screw rod 1007 and lock nut 1005, through setting jacking screw rod 1007, when jacking screw rod 1007 rotates, it is convenient to adjust the work load of jacking screw rod 1007, by adopting torque wrench according to the predetermined tightening sequence tightens jacking screw rod 1007, and exerts the rated pre -tightening force on stand 1003, due to the force of jacking screw rod 1007 directly pulls up stand 1003, makes stand 1003 produce a larger pre -tightening force, and the pre -tightening force of jacking screw rod 1007 can be accurately controlled, so the pre -tightening force of stand 1003 also has been accurately controlled.

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0027] Please refer to Figures 1-3The utility model provides a technical scheme: a plurality of threaded holes 1006 and a plurality of jacking threaded rods are equidistant annular distribution, the upper end surface center of the frame 1001 is connected with the press 1008, and the movable end of the press 1008 extends to the outside through the frame 1001 and is connected with the pressing plate 1009, the bottom end of the four columns 1003 extends to the outside through the pressing plate 1009 and is matched with the through hole gap of the pressing plate 1009, the four columns 1003 are connected with the placing table 1010 between the outside close to the bottom end, and the placing table 1010 is below the pressing plate 1009, through equidistant annular distribution of a plurality of threaded holes 1006 and jacking screw rod 1007, a plurality of jacking screw rod 1007 is uniformly stressed, through the cooperation of the press 1008 and the pressing plate 1009, when the press 1008 works, its movable end will drive the pressing plate 1009 to move upwards or downwards, since the bottom end of the four columns 1003 penetrates the pressing plate 1009 and is matched with the through hole gap of the pressing plate 1009, the pressing plate 1009 is stably moved upwards or downwards on the four columns 1003, through the setting of the placing table 1010, and the placing table 1010 is below the pressing plate 1009, the workpiece to be pressed is placed on the placing table 1010, when the pressing plate 1009 is pressed, a strong pressure is applied to the workpiece to be pressed, so that the workpiece to be pressed is plastically deformed and fractured, thereby processing into the required parts or products.

[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0029] Please refer to Figures 1-3 The utility model provides a technical scheme: the support mechanism 200 includes the base 2001, and the bottom end of the four columns 1003 is connected with the upper end surface four corners of the base 2001 respectively, and both sides of the outside of the base 2001 are connected with a pair of reinforcing pieces 2002, and the inside bottom end center of the two pairs of reinforcing pieces 2002 is provided with a screw hole, through the setting of the base 2001, since the upper end surface four corners of the base 2001 are connected with the bottom end of the four columns 1003 respectively, the base 2001 can support the column 1003 conveniently, the reinforcing piece 2002 can increase the structural strength of the base 2001 by installing the reinforcing piece 2002 on both sides of the outside of the base 2001, thereby improving the stability and the load bearing capacity of the base 2001, and the screw hole is set in the inside bottom end center of the reinforcing piece 2002, when the bolt fastener is connected with the screw hole threadedly, the reinforcing piece 2002 can be fixed on the base or other structure, thereby preventing the base 2001 from loosening.

[0030] Specifically, the working principle of the structure for precisely applying pre-tightening force to large columns is as follows: in use, first, the column 1003 is fixed on the base 1001 by manually tightening the locking nut 1005, and then the jacking screw 1007 is tightened according to a predetermined tightening sequence by using a torque wrench; according to the size of the locking nut 1005 and the number of threaded holes 1006 formed in the upper end of the locking nut 1005, the same number of jacking screws 1007 as the threaded holes 1006 can be arranged; since the jacking screw 1007 and the threaded hole 1006 in the locking nut 1005 are in close cooperation, the movement of the locking nut 1005 will drive the column 1003 to move upward or downward; when the jacking screw 1007 is rotated, the force acting on the column 1003 will directly lift the column 1003, so that a large pre-tightening force is generated on the column 1003; the pre-tightening force of the jacking screw 1007 can be precisely controlled by the torque wrench, so that the pre-tightening force of the column 1003 is also precisely controlled; in the later maintenance, the pre-tightening force of the jacking screw 1007 can be checked; and the base 1001 is protected by adding a pad 1004 with a hardness comparable to that of the jacking screw 1007 between the base 1001 and the jacking screw 1007.

Claims

1. A structure for precisely applying a pre-tightening force to a large column, characterized by, The utility model provides a kind of supporting mechanism (200) and main body (100) comprising, the main body (100) includes pedestal (1001), the upper end of pedestal (1001) is opened with circular groove (1002) in four corners, the inside center of four circular grooves (1002) is opened with through-hole, the inside of four through-holes is equipped with stand (1003), four stand (1003) is equipped with pad (1004) in the outside located in the upper end of pedestal (1001), the pad (1004) is arranged in the inside of circular groove (1002), the outside of four stand (1003) is close to upper end and is equipped with external thread, and the outside of four stand (1003) is close to upper end and is screw-connected with lock nut (1005), lock nut (1005) is opened with several threaded holes (1006) on, the inside of several threaded holes (1006) is screw-connected with jacking screw rod (1007), the bottom end of several jacking screw rods (1007) is pressed and fits with the upper end of pad (1004).

2. The structure for precisely applying a pre-tightening force to a large column according to claim 1, wherein Several threaded holes (1006) and several jacking screw rods are evenly distributed in ring shape.

3. The structure for precisely applying a pre-tightening force to a large column according to claim 2, wherein The upper end surface center of the pedestal (1001) is connected with press (1008), the movable end of press (1008) extends to outside through pedestal (1001), and is connected with pressing plate (1009), the bottom end of four stand (1003) extends to outside through pressing plate (1009), and is matched with the through-hole gap of pressing plate (1009).

4. The structure for precisely applying a pre-tightening force to a large column according to claim 3, wherein Four stand (1003) is connected between the outside near bottom end and is placed with table (1010), and the table (1010) is below pressing plate (1009).

5. The structure for precisely applying a pre-tightening force to a large column according to claim 1, wherein The supporting mechanism (200) includes a base (2001), the upper end surface of the base (2001) is connected with the bottom end of the four stands (1003) respectively, and the outside of the base (2001) is connected with a pair of reinforcing members (2002) on both sides.

6. The structure for precisely applying a pre-tightening force to a large column according to claim 5, wherein The inside bottom end center of the two pairs of reinforcing members (2002) is opened with a threaded hole.

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