Pre-positioning tool for large welding part

Abstract

The invention relates to the technical field of installation and adjustment of large welding parts, and discloses a pre-positioning tool for large welding parts, which comprises a tool body, a wedge block is vertically and additionally arranged in a square groove of the tool body, and the bottom of the wedge block is tightly attached to the bottom end of the tool body. And set screws are longitudinally inserted in the center positions of the front end and the rear end of the top of the tool body. According to the pre-positioning tool for the large welding part, the machining allowance lines in the height direction of the machine body and the clamping state of the next machining procedure of the machine body are marked on the upper panel and the lower panel, and when the pre-positioning tool is installed, wedge blocks with proper thicknesses are selected according to the thicknesses of the panels; the pre-positioning tool is clamped after the scale notch of the tool body is aligned with a machining allowance line on a panel, after a machine body is placed on a workbench of machining equipment, equal-height cushion blocks are placed on the periphery of the pre-positioning tool, and after the machine body is cushioned and straightened in the length direction through thin gaskets, rapid positioning of the machine body in the horizontal direction can be completed in the mode.

Description

Technical Field

[0001] The invention relates to the technical field of installation and adjustment of large welded parts, in particular to a pre-positioning tool for large welded parts. Background Art

[0002] Marine diesel engines have high thermal efficiency, good economy, easy starting, and great adaptability to various types of ships. After their introduction, they were quickly used as ship propulsion power. By the 1950s, diesel engines had almost completely replaced steam engines in newly built ships. Marine diesel engines have become the main power for civilian ships, small and medium-sized ships, and conventional submarines. Marine diesel engines can be divided into main engines and auxiliary engines according to their role in ships. The main engine is used as the propulsion power of the ship, and the auxiliary engine is used to drive generators, air compressors or water pumps, etc. Marine diesel engines are generally divided into high-speed, medium-speed and low-speed diesel engines. Its fuselage is an important part of the marine diesel engine. The structure is a frame welded part with a weight of more than 30 tons. It is necessary to use pre-positioning tooling so that the fuselage of the marine diesel engine can be quickly clamped and positioned on the machine tool for welding processing.

[0003] A common pre-positioning tool for large welded parts is to fit the pre-positioning tool to the corresponding position of the side of the welded part, and then clamp and fix the connection. After clamping and fixing another set of welded parts with the pre-positioning tool, the welded part is connected to the corresponding side of the welding of the other set of welded parts, and then the welded part and the other set of welded parts can be welded. The traditional pre-positioning tool for large welded parts has a very poor overall rigidity of the parts due to the huge size and weight of large welded parts (marine diesel engine fuselages) and the frame structure after welding. The clamping and adjustment during processing is very difficult and time-consuming. At the same time, it is impossible to achieve rapid clamping and positioning of the fuselage on the machine tool. For this reason, a pre-positioning tool for large welded parts is proposed. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies of the prior art, the present invention provides a pre-positioning tool for large welded parts to solve the above-mentioned technical problems.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a pre-positioning tool for large welded parts, comprising a tool body, a square groove is provided at the center of one side of the tool body, and the bottom of the square groove is inclined, a wedge block is vertically added inside the square groove of the tool body, and the bottom of the wedge block is tightly fitted with the bottom of the square groove of the tool body, and a set screw is longitudinally inserted at the center of the front and rear ends of the top of the tool body. After the tool body, the wedge block and the set screw are assembled, it can be installed on the upper and lower large flat bottom plates of the welded fuselage of a marine diesel engine, and the pre-positioning installation of the fuselage can be completed by adjusting the wedge block left and right and aligning the calibration notches on the left and right sides of the tool body with the thickness margin line. By marking the fuselage, marking the machining allowance line in the thickness direction of the panel, combining the set screws, wedge blocks, and tooling body into a set of pre-positioning tooling, installing this set of pre-positioning tooling on the bottom panel of the fuselage based on the installation direction of the fuselage on the processing equipment, ensuring that the set screws are facing upwards, adjusting the wedge blocks left and right, aligning the scale notch on the tooling body with the machining allowance line of the fuselage, and tightening the set screws. At this time, the parallel state of the fuselage machining allowance line and the bottom plane of the pre-positioning tooling is ensured, and four sets of pre-positioning tooling are evenly distributed and installed according to the overall size of the fuselage. The face of the fuselage installation tooling is facing downwards and placed on the workbench of the processing equipment. The bottom planes of the four sets of pre-positioning tooling are in contact with the tooling. The workbench ensures that the machining allowance line of the fuselage is parallel to the plane of the workbench, completes the rapid positioning of the fuselage in the horizontal direction, and after straightening the length direction of the fuselage, evenly places equal-height pads around the pre-positioning tooling and under the fuselage partitions, and after the equal-height pads and the bottom plane of the fuselage are padded with thin gaskets, a pressure plate is placed above the equal-height pads to press the fuselage, which can complete the rapid positioning and clamping of the fuselage. At the same time, parts that can be directly made or purchased can be made directly, and the manufacturing difficulty is low. By adjusting the opening distance of the tooling body and the position of the wedge block, it can be suitable for fuselages of various plate thicknesses and can be suitable for other large-scale welding parts of similar structures. It has the characteristics of wide application range, low application cost and convenient use.

[0008] Preferably, an L-shaped block is longitudinally installed on one side of the bottom of the tool body, a U-shaped frame plate is longitudinally added on one side of the tool body, and a self-locking universal wheel is longitudinally installed on the bottom of the U-shaped frame plate. The U-shaped frame plate can drive the connecting structure to move under the action of the self-locking universal wheel, and the tool body can be connected to the corresponding structure under the action of the L-shaped block.

[0009] Preferably, a counterweight box is longitudinally installed on the upper part, the center and the lower part of the outer side of the U-shaped frame plate, a protective shell is longitudinally added at the center of the top side of the U-shaped frame plate, and a driving motor is longitudinally installed in the inner cavity of the protective shell. The counterweight box balances the weight on both sides of the U-shaped frame plate, thereby preventing one side of the U-shaped frame plate from being overweight and causing it to tip over, and the protective shell provides a certain protective effect on the driving motor.

[0010] Preferably, a threaded screw is longitudinally installed in the inner cavity of the U-shaped frame plate, and the top end of the threaded screw is coaxially connected to the rotor of the driving motor, and a sliding block is sleeved at the center of the outer edge of the threaded screw. The rotor of the driving motor drives the threaded screw to rotate in the inner cavity of the U-shaped frame plate and controls the rotation direction of the threaded screw, and the sliding block moves up and down according to the rotation direction of the threaded screw.

[0011] Preferably, the inner center of the U-shaped frame plate is longitudinally provided with a limiting convex groove, and the inner center of the limiting convex groove is longitudinally provided with a limiting convex plate, and a connecting plate is transversely installed on one side of the limiting convex plate, and one side of the connecting plate is connected to the corresponding side of the sliding block. When the sliding block is lifted, it drives the connected limiting convex plate to move along the limiting convex groove of the U-shaped frame plate, thereby avoiding the occurrence of deflection caused by excessive weight on one side of the sliding block.

[0012] Preferably, a fixing plate is installed transversely at the center of the outer side of the sliding block, and an L-shaped slot is longitudinally provided at the center of the top of the fixing plate, and is connected to the L-shaped block of the tooling body. When the sliding block is lifted and lowered, the L-shaped slot of the fixing plate drives the L-shaped block and the tooling body to lift and lower the large welded part, thereby adjusting the height of the large welded part, so that the device drives the large welded part to adjust its position and height on the fuselage, which is convenient for the tooling body to be installed and used with the fuselage.

[0013] (III) Beneficial effects

[0014] Compared with the prior art, the present invention provides a pre-positioning tool for large welded parts, which has the following beneficial effects:

[0015] 1. The pre-positioning tooling used for large welded parts first marks the fuselage, marks the machining allowance lines in the height direction of the fuselage on the upper and lower panels, and installs four sets of pre-positioning tooling on the panel of the lower plane according to the clamping state of the next machining process of the fuselage. When installing the pre-positioning tooling, select a wedge block of suitable thickness according to the thickness of the panel, use the scale notch of the tooling body to align the machining allowance line on the panel and then clamp the pre-positioning tooling. After the fuselage is placed on the workbench of the processing equipment, place equal-height pads around the four sets of pre-positioning tooling and pad them with thin gaskets. After straightening the length direction of the fuselage, press the fuselage with a pressing plate to complete the positioning and installation of the fuselage. In this way, the rapid positioning of the fuselage in the horizontal direction can be completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention;

[0017] Figure 2 It is a schematic diagram of the structure of the device of the present invention from the right side;

[0018] Figure 3 It is a schematic diagram of the right side view of the tooling body and its connection structure of the present invention.

[0019] In the figure: 1. tooling body; 2. wedge block; 3. set screw; 4. U-shaped frame plate; 5. counterweight box; 6. drive motor; 7. threaded screw. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] The present invention provides a technical solution, a pre-positioning tool for large welded parts, including a tool body 1, a wedge block 2, a set screw 3, a U-shaped frame plate 4, a counterweight box 5, a drive motor 6 and a threaded screw 7, please refer to Figure 3, including a tool body 1, a square groove is provided at the center of one side of the tool body 1, and the bottom of the square groove is inclined, a wedge block 2 is vertically added inside the square groove of the tool body 1, and the bottom of the wedge block 2 is tightly fitted with the bottom of the square groove of the tool body 1, and a set screw 3 is longitudinally inserted at the center of the front and rear ends of the top of the tool body 1. After assembling the tool body 1, the wedge block 2 and the set screw 3, it can be installed on the upper and lower large flat bottom plates of the welded fuselage of a marine diesel engine. By adjusting the wedge block 2 left and right, the calibration notches on the left and right sides of the tool body 1 are aligned with the thickness margin line to complete the pre-positioning installation of the fuselage. By replacing the wedge blocks 2 of different sizes, it can adapt to bottom plates of different thicknesses. By marking the fuselage, the machining allowance line in the thickness direction of the panel is marked, and the set screws 3, wedge blocks 2, and tooling body 1 are combined into a set of pre-positioning tooling. This set of pre-positioning tooling is installed on the bottom panel of the fuselage based on the installation direction of the fuselage on the processing equipment, ensuring that the set screws 3 are facing upwards, and the wedge blocks 2 are adjusted left and right. After the scale notch on the tooling body 1 is aligned with the machining allowance line of the fuselage, the set screws 3 are tightened. At this time, the parallel state of the machining allowance line of the fuselage and the bottom plane of the pre-positioning tooling is ensured, and four sets of pre-positioning tooling are evenly distributed according to the overall size of the fuselage. The surface of the fuselage installation tooling is placed face down on the workbench of the processing equipment, and the bottom planes of the four sets of pre-positioning tooling are connected. Touching the workbench ensures that the machining allowance line of the fuselage is parallel to the plane of the workbench, completes the rapid positioning of the fuselage in the horizontal direction, and after straightening the length direction of the fuselage, evenly places equal-height pads around the pre-positioning tooling and under the fuselage partition, and after padding the equal-height pads and the bottom plane of the fuselage with thin gaskets, put a pressure plate on the equal-height pads to press the fuselage, which can complete the rapid positioning and clamping of the fuselage. At the same time, the parts can be directly made or purchased, and the manufacturing difficulty is low. By adjusting the opening distance of the tooling body 1 and the position of the wedge block 2, it can be suitable for fuselages of various plate thicknesses and can be suitable for other large-scale welding parts of similar structures. It has the characteristics of wide application range, low application cost and convenient use.

[0022] See also Figure 1 An L-shaped block is longitudinally installed on one side of the bottom of the tooling body 1, a U-shaped frame plate 4 is longitudinally added on one side of the tooling body 1, and a self-locking universal wheel is longitudinally installed on the bottom of the U-shaped frame plate 4. The U-shaped frame plate 4 can drive the connecting structure to move under the action of the self-locking universal wheel, and the tooling body 1 can be connected with the corresponding structure under the action of the L-shaped block. A counterweight box 5 is longitudinally installed on the upper part, the center position and the lower part of the outer side of the U-shaped frame plate 4, and a protective shell is longitudinally added on the center position of one side of the top of the U-shaped frame plate 4, and a driving motor 6 is longitudinally installed in the inner cavity of the protective shell. The weight of both sides of the U-shaped frame plate 4 is balanced by the counterweight box 5, so as to avoid the phenomenon of one side of the U-shaped frame plate 4 being overweight and causing it to tip over. At the same time, the protective shell provides a certain protective effect on the driving motor 6.

[0023] See also Figure 2 , a threaded screw 7 is longitudinally installed in the inner cavity of the U-shaped frame plate 4, and the top of the threaded screw 7 is coaxially connected to the rotor of the driving motor 6, and a sliding block is sleeved at the center of the outer surface of the threaded screw 7. The rotor of the driving motor 6 drives the threaded screw 7 to rotate in the inner cavity of the U-shaped frame plate 4, and controls the rotation direction of the threaded screw 7, and the sliding block performs lifting and lowering movements according to the rotation direction of the threaded screw 7. A limiting convex groove is longitudinally provided at the center of the inner cavity of the U-shaped frame plate 4, and a limiting convex plate is longitudinally provided at the center of the inner cavity of the limiting convex groove, and a connecting plate is transversely installed on one side of the limiting convex plate, and one side of the connecting plate is connected to the corresponding side of the sliding block. When the sliding block performs lifting and lowering movements, it drives the connected limiting convex plate to move along the limiting convex groove of the U-shaped frame plate 4, thereby avoiding the occurrence of deflection caused by excessive weight on one side of the sliding block. A fixed plate is installed horizontally at the center of the outer side of the sliding block, and an L-shaped slot is longitudinally opened at the center of the top of the fixed plate, and is connected to the L-shaped block of the tooling body 1. When the sliding block is lifted and lowered, the L-shaped block and the tooling body 1 are driven to lift and lower between the large welded parts through the L-shaped slot of the fixed plate, so that the height of the large welded parts can be adjusted, so that the device drives the large welded parts on the fuselage to adjust the position and height, which is convenient for the tooling body 1 to be installed and used with the fuselage.

[0024] The working principle of this device is as follows: by marking the fuselage, marking the machining allowance line in the thickness direction of the panel, combining the set screws 3, wedge blocks 2, and tooling body 1 into a set of pre-positioning tooling, and installing this set of pre-positioning tooling on the bottom panel of the fuselage based on the installation direction of the fuselage on the processing equipment, ensuring that the set screws 3 are facing upwards, adjusting the wedge blocks 2 left and right, aligning the scale notch on the tooling body 1 with the machining allowance line of the fuselage, and tightening the set screws 3. At this time, the parallel state of the fuselage machining allowance line and the bottom plane of the pre-positioning tooling is ensured, and four sets of pre-positioning tooling are evenly distributed and installed according to the overall size of the fuselage. The face of the fuselage installation tooling is facing down and placed on the workbench of the processing equipment. The bottom planes of the four sets of pre-positioning tooling touch the workbench, which ensures that the fuselage machining allowance line is parallel to the plane of the workbench, completing the horizontal orientation of the fuselage. After the quick positioning in the direction of the U-shaped frame plate 4 is completed and the length direction of the fuselage is straightened, equal-height pads are evenly placed around the pre-positioning tooling and under the fuselage partition. After the equal-height pads and the bottom plane of the fuselage are padded with thin pads, a pressure plate is placed on the equal-height pads to press the fuselage, so as to complete the quick positioning and clamping of the fuselage. The rotor of the driving motor 6 drives the threaded screw 7 to rotate in the inner cavity of the U-shaped frame plate 4, and controls the rotation direction of the threaded screw 7. The sliding block is lifted and lowered according to the rotation direction of the threaded screw 7. When the sliding block is lifted and lowered, it drives the L-shaped block and the tooling body 1 to lift and lower between the large welded parts through the L-shaped slot of the fixed plate, so as to adjust the height of the large welded parts, so that the equipment drives the large welded parts on the fuselage to adjust the position and height, which is convenient for the tooling body 1 to be installed and used with the fuselage.

[0025] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pre-positioning tool for large welded parts, comprising a tool body (1), characterized in that: A square groove is provided at the center of one side of the tool body (1), and the bottom of the square groove is inclined. A wedge block (2) is vertically provided inside the square groove of the tool body (1), and the bottom of the wedge block (2) is tightly fitted with the bottom of the square groove of the tool body (1). Set screws (3) are longitudinally inserted at the center of the front and rear ends of the top of the tool body (1).

2. A pre-positioning tool for large welded parts according to claim 1, characterized in that: An L-shaped clamping block is longitudinally mounted on one side of the bottom of the tool body (1), a U-shaped frame plate (4) is longitudinally added to one side of the tool body (1), and a self-locking universal wheel is longitudinally mounted on the bottom of the U-shaped frame plate (4).

3. A pre-positioning tool for large welded parts according to claim 2, characterized in that: A counterweight box (5) is longitudinally installed at the upper outer part, the center position and the lower part of the U-shaped frame plate (4), a protective shell is longitudinally provided at the center position of one side of the top of the U-shaped frame plate (4), and a driving motor (6) is longitudinally installed in the inner cavity of the protective shell.

4. A pre-positioning tool for large welded parts according to claim 3, characterized in that: A threaded screw (7) is longitudinally mounted in the inner cavity of the U-shaped frame plate (4), and the top end of the threaded screw (7) is coaxially connected to the rotor of the drive motor (6). A sliding block is sleeved at the center of the outer edge of the threaded screw (7).

5. A pre-positioning tool for large welded parts according to claim 4, characterized in that: A limiting convex groove is longitudinally provided at the center of the inner cavity of the U-shaped frame plate (4), and a limiting convex plate is longitudinally provided at the center of the inner cavity of the limiting convex groove. A connecting plate is transversely installed on one side of the limiting convex plate, and one side of the connecting plate is connected to the corresponding side of the sliding block.

6. A pre-positioning tool for large welded parts according to claim 5, characterized in that: A fixing plate is transversely mounted at the outer center of the sliding block, and an L-shaped slot is longitudinally provided at the top center of the fixing plate and is connected to the L-shaped fixing block of the tooling body (1).

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