Combined tool for batch production of reciprocating pump frames

Abstract

The application discloses a combined tool for batch production of reciprocating pump racks, which comprises two transverse guides and two longitudinal guides, and the two transverse guides and the two longitudinal guides form a rectangular structure; one end of the two longitudinal guides is provided with a left wall plate assembly, and the other end is provided with a right wall plate assembly; the left wall plate assembly and the right wall plate assembly are perpendicular to the longitudinal guides respectively; a walking mechanism is arranged between the left wall plate assembly and one of the longitudinal guides; one end of the two transverse guides is provided with a front wall plate assembly, and the other end is provided with a rear wall plate assembly; the front wall plate assembly and the rear wall plate assembly are perpendicular to the transverse guides respectively; and the front wall plate assembly is arranged on the side close to the walking mechanism. The combined tool for batch production of reciprocating pump racks positions the machining positions, guarantees the assembly and welding precision, meets the consistency requirement of a welding robot on the welding positions, simultaneously utilizes the tool positioning, avoids repeated size measurement, and improves the assembly efficiency.

Description

Technical Field

[0001] This invention belongs to the technical field of modular tooling equipment, and relates to modular tooling for mass production of reciprocating pump frames. Background Technology

[0002] The fracturing pump is the core equipment of the fracturing acidizing unit, characterized by high pressure, strong stability, compact structure and light weight; the plunger pump frame is the core component of the plunger pump. With the continuous expansion of the fracturing market demand, the conventional method of manually assembling the frame can no longer meet the production capacity requirements, and it is necessary to use welding robots to meet the needs of mass production.

[0003] The plunger pump is a multi-cylinder crankshaft connecting rod reciprocating pump with a multi-wall plate welded frame. The frame has many machining parts, each requiring high dimensional accuracy. Welding deviations lead to uneven machining allowances during overall processing, resulting in uneven finished dimensions and increased product weight. Plunger pumps have extremely high weight control requirements; otherwise, the fracturing truck's operation will be affected. Secondly, due to space constraints, lubricating oil holes and gland holes on the bearing seats can only be machined individually. Welding deviations can cause misalignment between the finished oil groove and the individually machined lubricating oil hole, and prevent the installation of the bearing gland, affecting product quality. Welding robots are mainly used for mass production of single pieces on assembly lines, requiring high repeatability of the test pieces. Current welding robots have limited automatic correction capabilities and require high assembly accuracy of the workpieces before welding, mainly in: 1) consistency of the position and dimensions of individual welds, bevels, and assembly gaps; 2) consistency of the assembly dimensions of batch pump frames. Conventional manual assembly methods are difficult to achieve the requirements of robotic welding.

[0004] Therefore, a modular tooling is needed to meet the requirements of mass production of machine frames. It should not only meet the accuracy requirements of the dimensions of the processed parts, but also meet the requirements of robot welding for bevels, assembly gaps, positional dimensions, batch consistency, etc., and meet the requirements of assembly efficiency for mass production. Summary of the Invention

[0005] The purpose of this invention is to provide a combined tooling for the mass production of reciprocating pump frames, which solves the problems of multiple machining parts and low assembly accuracy of existing reciprocating pump frames.

[0006] The technical solution adopted in this invention is a combined tooling for mass production of reciprocating pump frames, comprising two transverse guide rails and two longitudinal guide rails, the two transverse guide rails and two longitudinal guide rails forming a rectangular structure;

[0007] A left wall panel assembly is installed at one end of two longitudinal guide rails, and a right wall panel assembly is installed at the other end. The left wall panel assembly and the right wall panel assembly are perpendicular to the longitudinal guide rails respectively. A traveling mechanism is installed between the left wall panel assembly and one of the longitudinal guide rails.

[0008] A front wall panel assembly is installed at one end of the two transverse guide rails, and a rear wall panel assembly is installed at the other end. The front wall panel assembly and the rear wall panel assembly are perpendicular to the transverse guide rails, and the front wall panel assembly is located on the side closer to the traveling mechanism.

[0009] The invention is further characterized by:

[0010] The traveling mechanism includes a servo motor mounted on the left wall panel assembly, with a gear on the output shaft of the servo motor and a rack fixed on one of the longitudinal guide rails, the gear and rack meshing.

[0011] The left and right wall panel assemblies are symmetrically equipped with a three-jaw chuck and a side positioning post, with the side positioning post located on the side closer to the traveling mechanism.

[0012] The right wall panel assembly is also equipped with positioning pins.

[0013] Front positioning posts are symmetrically arranged on the front wall panel assembly and the rear wall panel assembly.

[0014] Several sets of support mechanisms are also provided between the left wall panel assembly and the right wall panel assembly. Each set of support mechanisms includes two support mechanisms, which are arranged parallel to the left wall panel assembly.

[0015] The support mechanism includes a telescopic rod and a base. Both the telescopic rod and the base are T-shaped structures, with one end of the base axially fitted with the telescopic rod.

[0016] The base has a locking bolt radially installed at one end of the inner telescopic rod.

[0017] It also includes several spacing positioning devices, each of which includes two sets of clamping bolts.

[0018] It also includes a support rib positioning block, which has an "I" shaped structure.

[0019] The beneficial effects of this invention are:

[0020] (1) Design a combination tooling to position the machining parts such as bearing housing, ensure the welding dimensional accuracy of the machining parts, and meet the overall machining allowance requirements after the frame is welded.

[0021] (2) The bearing seat inner hole and overall length of the main wall plate are machined as single parts to ensure that the dimensions of the machined bearing seat part and the weld parts at both ends are consistent. The flatness of the plate surface is controlled to ensure the consistency of the dimensions, bevel and combination gap of each weld position on the main wall plate. The flatness of the plate surface of other parts is controlled to ensure the relative dimensional accuracy of the weld and the consistency of the combination gap.

[0022] (3) By combining the positioning of the combined tooling with ensuring the consistency of the dimensions of individual parts, the welding robot’s requirements for the consistency of the welding parts are met. The batch consistency requirements are met by the repeated positioning accuracy of the tooling. At the same time, the positioning of the tooling avoids repeated dimension measurements and improves the combination efficiency. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the reciprocating pump frame;

[0024] Figure 2 This is a structural schematic diagram of the main wall panel in the reciprocating pump frame;

[0025] Figure 3 This is a top view of the combined tooling for mass production of reciprocating pump frames according to the present invention;

[0026] Figure 4 This is a partial structural schematic diagram of the left side of the combined tooling of the present invention;

[0027] Figure 5 This is a schematic diagram of the support mechanism in the combined tooling of the present invention;

[0028] Figure 6 This is a schematic diagram of the spacing positioning device in the combined tooling of the present invention;

[0029] Figure 7 This is a partial structural diagram of the front side of the combined tooling of the present invention;

[0030] Figure 8 This is a schematic diagram of the structure of the support rib positioning block in the combined tooling of the present invention.

[0031] In the diagram, 1. Front wall panel, 2. Support rib, 3. Main wall panel, 3-1. Bearing seat, 3-2. Wall panel body, 4. Bearing cap hole, 5. Rear wall panel, 6. Oil groove, 7. Lubricating oil hole, 8. Left wall panel assembly, 9. Right wall panel assembly, 10. Front wall panel assembly, 11. Rear wall panel assembly, 12. Transverse guide rail, 13. Longitudinal guide rail, 14. Support mechanism, 15. Spacing positioning device, 16. Traveling mechanism, 17. Three-jaw chuck, 18. Side positioning column, 19. Front positioning column, 20. Servo motor, 21. Rack, 22. Positioning pin, 23. Telescopic rod, 24. Base, 25. Clamping bolt, 26. Support rib positioning block. Detailed Implementation

[0032] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0033] Example 1

[0034] The structure of the reciprocating pump frame, such as Figure 1 and Figure 2As shown, it includes a front wall panel 1, a support rib 2, a main wall panel 3, and a rear wall panel 5. The main wall panel 3 is composed of two parts: a bearing seat 3-1 and a wall panel body 3-2. The bearing seat 3-1 is provided with a bearing cap hole 4, a lubricating oil hole 7, and an oil groove 6. The bearing housing 3-1 is machined as a single piece, and the bearing cap hole 4 and lubricating oil hole 7 are machined. A small amount of machining allowance is left for the inner hole and thickness of the bearing housing 3-1. The wall panel 3-2 is cut using a CNC cutting machine. A small amount of machining allowance is left for the straight edges at both ends of the wall panel 3-2. After cutting, the plate surface is leveled with an error ≤1.5mm. The bearing housing 3-1 and the wall panel 3-2 are welded together to form the main wall panel 3. After welding, the overall flatness error is controlled to be ≤2mm to ensure the consistency of the transverse position of the weld. The main wall panel 3 is clamped with the machined inner hole of the bearing housing 3-1 as the reference, and the straight edges and bevels at both ends of the wall panel 3-2 are machined to ensure the consistency of the length and bevel dimensions of the main wall panel 3, and to ensure the consistency of the relative position dimensions of the bearing housing hole centerline and the straight edges at both ends, thereby ensuring the consistency of the longitudinal position of the weld and the consistency of the assembly gap.

[0035] This invention relates to a combination tooling for the mass production of reciprocating pump frames, such as... Figure 3 As shown, the structure includes two transverse guide rails 12 and two longitudinal guide rails 13, forming a rectangular structure. A left wall panel assembly 8 is mounted at one end of each of the two longitudinal guide rails 13, and a right wall panel assembly 9 is mounted at the other end. The left and right wall panel assemblies 8 and 9 are perpendicular to the longitudinal guide rails 13, respectively. A traveling mechanism 16 is positioned between the left wall panel assembly 8 and one of the longitudinal guide rails 13. The left wall panel assembly 8 can move continuously on the longitudinal guide rail 13, and its position on the longitudinal guide rail 13 can be controlled by the traveling mechanism 16. The right wall panel assembly 9 can also move continuously on the longitudinal guide rail 13 and can be locked in place by a positioning pin 22. A front wall panel assembly 10 is mounted at one end of each of the two transverse guide rails 12, and a rear wall panel assembly 11 is mounted at the other end. The front and rear wall panel assemblies 10 and 11 are perpendicular to the transverse guide rails 12, with the front wall panel assembly 10 positioned on the side closest to the traveling mechanism 16. The front wall panel assembly 10 and the rear wall panel assembly 11 can slide continuously on the transverse guide rail 12, and the sides of the front wall panel assembly 10 and the rear wall panel assembly 11 are perpendicular to the transverse guide rail 12.

[0036] The walking mechanism 16 includes a servo motor 20 mounted on the left wall panel assembly 8. A gear is provided on the output shaft of the servo motor 20, and a rack 21 is fixed on one of the longitudinal guide rails 13. The gear and the rack 21 mesh. The servo motor 20 drives the gear to rotate, and the meshing of the gear and the rack 21 can control the left wall panel assembly 8 to move and be positioned on the longitudinal guide rail 13.

[0037] Example 2

[0038] The structure of the reciprocating pump frame, such as Figure 1 and Figure 2As shown, it includes a front wall panel 1, a support rib 2, a main wall panel 3, and a rear wall panel 5. The main wall panel 3 is composed of two parts: a bearing seat 3-1 and a wall panel body 3-2. The bearing seat 3-1 is provided with a bearing cap hole 4, a lubricating oil hole 7, and an oil groove 6. The bearing housing 3-1 is machined as a single piece, and the bearing cap hole 4 and lubricating oil hole 7 are machined. A small amount of machining allowance is left for the inner hole and thickness of the bearing housing 3-1. The wall panel 3-2 is cut using a CNC cutting machine. A small amount of machining allowance is left for the straight edges at both ends of the wall panel 3-2. After cutting, the plate surface is leveled with an error ≤1.5mm. The bearing housing 3-1 and the wall panel 3-2 are welded together to form the main wall panel 3. After welding, the overall flatness error is controlled to be ≤2mm to ensure the consistency of the transverse position of the weld. The main wall panel 3 is clamped with the machined inner hole of the bearing housing 3-1 as the reference, and the straight edges and bevels at both ends of the wall panel 3-2 are machined to ensure the consistency of the length and bevel dimensions of the main wall panel 3, and to ensure the consistency of the relative position dimensions of the bearing housing hole centerline and the straight edges at both ends, thereby ensuring the consistency of the longitudinal position of the weld and the consistency of the assembly gap.

[0039] This invention relates to a combination tooling for the mass production of reciprocating pump frames, such as... Figure 3 As shown, the structure includes two transverse guide rails 12 and two longitudinal guide rails 13, forming a rectangular structure. A left wall panel assembly 8 is mounted at one end of each of the two longitudinal guide rails 13, and a right wall panel assembly 9 is mounted at the other end. The left and right wall panel assemblies 8 and 9 are perpendicular to the longitudinal guide rails 13, respectively. A traveling mechanism 16 is positioned between the left wall panel assembly 8 and one of the longitudinal guide rails 13. The left wall panel assembly 8 can move continuously on the longitudinal guide rail 13, and its position on the longitudinal guide rail 13 can be controlled by the traveling mechanism 16. The right wall panel assembly 9 can also move continuously on the longitudinal guide rail 13 and can be locked in place by a positioning pin 22. A front wall panel assembly 10 is mounted at one end of each of the two transverse guide rails 12, and a rear wall panel assembly 11 is mounted at the other end. The front and rear wall panel assemblies 10 and 11 are perpendicular to the transverse guide rails 12, with the front wall panel assembly 10 positioned on the side closest to the traveling mechanism 16. The front wall panel assembly 10 and the rear wall panel assembly 11 can slide continuously on the transverse guide rail 12, and the sides of the front wall panel assembly 10 and the rear wall panel assembly 11 are perpendicular to the transverse guide rail 12.

[0040] The walking mechanism 16 includes a servo motor 20 mounted on the left wall panel assembly 8. A gear is provided on the output shaft of the servo motor 20, and a rack 21 is fixed on one of the longitudinal guide rails 13. The gear and the rack 21 mesh. The servo motor 20 drives the gear to rotate, and the meshing of the gear and the rack 21 can control the left wall panel assembly 8 to move and be positioned on the longitudinal guide rail 13.

[0041] The left-side partial structure of the combined tooling of this invention, such as... Figure 4As shown, a three-jaw chuck 17 and a side positioning post 18 are symmetrically arranged on the left wall panel assembly 8 and the right wall panel assembly 9, respectively. The side positioning post 18 is located near the side of the traveling mechanism 16. A positioning pin 22 is also provided on the right wall panel assembly 9. The left wall panel assembly 8 has a three-jaw chuck 17 and a side positioning post 18. In use, the side of the bearing seat 3-1 on the main wall panel 3 is in close contact with the side of the left wall panel assembly 8, which controls the axial direction of the bearing seat 3-1 to be parallel to the longitudinal guide rail 13. The three-jaw chuck 17 is used to center the inner hole machining surface of the bearing seat. The side positioning post 18 uses the inner contour of the wall panel body 3-2 to position the height of the front end of the main wall panel 3, which controls the radial positioning dimension of the bearing seat 3-1. By continuously sliding the left wall panel assembly 8 on the longitudinal guide rail 13, the radial positioning dimension and axial direction of each bearing seat 3-1 are positioned in sequence, which ensures that multiple bearing seats 3-1 are concentric and their axes are parallel to the longitudinal guide rail 13. The position of the left wall panel assembly 8 on the longitudinal guide rail 13 is controlled by the servo motor 20 of the walking mechanism 16, which also controls the axial position of the main wall panel 3. The right wall panel assembly 9 and the left wall panel assembly 8 are symmetrical. The three-jaw chuck 17 on the right wall panel assembly 9 is concentric with the three-jaw chuck 17 on the left wall panel assembly 8, which ensures that the bearing seats 3-1 where the left and right wall panel assemblies are positioned are concentric and their axes are parallel to the longitudinal guide rail 13. The right wall panel assembly 9 has a position locking pin 22, which can lock the right wall panel assembly 9 in a fixed position on the longitudinal guide rail 13. It can be moved on the longitudinal guide rail 13 by manual pushing.

[0042] The support mechanism in the combined tooling of this invention, such as Figure 5 As shown, several sets of support mechanisms 14 are also provided between the left wall panel assembly 8 and the right wall panel assembly 9. Each set of support mechanisms 14 includes two support mechanisms 14, which are arranged parallel to the left wall panel assembly 8. The support mechanism 14 is a telescopic mechanism, fixed on the platform according to the spacing of the main wall panels 3. After the main wall panels 3 are moved to the position using the left wall panel assembly 8, the support mechanism 14 supports the main wall panels 3. The support mechanism 14 includes a telescopic rod 23 and a base 24. Both the telescopic rod 23 and the base 24 are T-shaped structures. One end of the plane of the base 24 is fixed to the platform, and the other end is axially fitted with the telescopic rod 23. A locking bolt is provided radially at the end of the base 24 where the telescopic rod 23 is fitted. The base 24 is installed on the platform in the middle of the tooling according to the spacing of the main wall panels 3. The telescopic rod 23 can extend and retract on the base 24 and can be locked with the locking bolt. When in use, after the left wall panel assembly 8 clamps the main wall panel 3 and moves it to the position, the telescopic rod 23 is raised to contact the main wall panel 3. Then the locking bolt is rotated to lock the telescopic rod 23, which supports the main wall panel 3 and prevents the main wall panel 3 from sinking after the left wall panel assembly 8 is removed. The telescopic rod 23 also adapts to the manufacturing error of the contour of the main wall panel 3 by extending and retracting.

[0043] Example 3

[0044] The structure of the reciprocating pump frame, such asFigure 1 and Figure 2 As shown, it includes a front wall panel 1, a support rib 2, a main wall panel 3, and a rear wall panel 5. The main wall panel 3 is composed of two parts: a bearing seat 3-1 and a wall panel body 3-2. The bearing seat 3-1 is provided with a bearing cap hole 4, a lubricating oil hole 7, and an oil groove 6. The bearing housing 3-1 is machined as a single piece, and the bearing cap hole 4 and lubricating oil hole 7 are machined. A small amount of machining allowance is left for the inner hole and thickness of the bearing housing 3-1. The wall panel 3-2 is cut using a CNC cutting machine. A small amount of machining allowance is left for the straight edges at both ends of the wall panel 3-2. After cutting, the plate surface is leveled with an error ≤1.5mm. The bearing housing 3-1 and the wall panel 3-2 are welded together to form the main wall panel 3. After welding, the overall flatness error is controlled to be ≤2mm to ensure the consistency of the transverse position of the weld. The main wall panel 3 is clamped with the machined inner hole of the bearing housing 3-1 as the reference, and the straight edges and bevels at both ends of the wall panel 3-2 are machined to ensure the consistency of the length and bevel dimensions of the main wall panel 3, and to ensure the consistency of the relative position dimensions of the bearing housing hole centerline and the straight edges at both ends, thereby ensuring the consistency of the longitudinal position of the weld and the consistency of the assembly gap.

[0045] This invention relates to a combination tooling for the mass production of reciprocating pump frames, such as... Figure 3 As shown, the structure includes two transverse guide rails 12 and two longitudinal guide rails 13, forming a rectangular structure. A left wall panel assembly 8 is mounted at one end of each of the two longitudinal guide rails 13, and a right wall panel assembly 9 is mounted at the other end. The left and right wall panel assemblies 8 and 9 are perpendicular to the longitudinal guide rails 13, respectively. A traveling mechanism 16 is positioned between the left wall panel assembly 8 and one of the longitudinal guide rails 13. The left wall panel assembly 8 can move continuously on the longitudinal guide rail 13, and its position on the longitudinal guide rail 13 can be controlled by the traveling mechanism 16. The right wall panel assembly 9 can also move continuously on the longitudinal guide rail 13 and can be locked in place by a positioning pin 22. A front wall panel assembly 10 is mounted at one end of each of the two transverse guide rails 12, and a rear wall panel assembly 11 is mounted at the other end. The front and rear wall panel assemblies 10 and 11 are perpendicular to the transverse guide rails 12, with the front wall panel assembly 10 positioned on the side closest to the traveling mechanism 16. The front wall panel assembly 10 and the rear wall panel assembly 11 can slide continuously on the transverse guide rail 12, and the sides of the front wall panel assembly 10 and the rear wall panel assembly 11 are perpendicular to the transverse guide rail 12.

[0046] The walking mechanism 16 includes a servo motor 20 mounted on the left wall panel assembly 8. A gear is provided on the output shaft of the servo motor 20, and a rack 21 is fixed on one of the longitudinal guide rails 13. The gear and the rack 21 mesh. The servo motor 20 drives the gear to rotate, and the meshing of the gear and the rack 21 can control the left wall panel assembly 8 to move and be positioned on the longitudinal guide rail 13.

[0047] The left-side partial structure of the combined tooling of this invention, such as... Figure 4As shown, a three-jaw chuck 17 and a side positioning post 18 are symmetrically arranged on the left wall panel assembly 8 and the right wall panel assembly 9, respectively. The side positioning post 18 is located near the side of the traveling mechanism 16. A positioning pin 22 is also provided on the right wall panel assembly 9. The left wall panel assembly 8 has a three-jaw chuck 17 and a side positioning post 18. In use, the side of the bearing seat 3-1 on the main wall panel 3 is in close contact with the side of the left wall panel assembly 8, which controls the axial direction of the bearing seat 3-1 to be parallel to the longitudinal guide rail 13. The three-jaw chuck 17 is used to center the inner hole machining surface of the bearing seat. The side positioning post 18 uses the inner contour of the wall panel body 3-2 to position the height of the front end of the main wall panel 3, which controls the radial positioning dimension of the bearing seat 3-1. By continuously sliding the left wall panel assembly 8 on the longitudinal guide rail 13, the radial positioning dimension and axial direction of each bearing seat 3-1 are positioned in sequence, which ensures that multiple bearing seats 3-1 are concentric and their axes are parallel to the longitudinal guide rail 13. The position of the left wall panel assembly 8 on the longitudinal guide rail 13 is controlled by the servo motor 20 of the walking mechanism 16, which also controls the axial position of the main wall panel 3. The right wall panel assembly 9 and the left wall panel assembly 8 are symmetrical. The three-jaw chuck 17 on the right wall panel assembly 9 is concentric with the three-jaw chuck 17 on the left wall panel assembly 8, which ensures that the bearing seats 3-1 where the left and right wall panel assemblies are positioned are concentric and their axes are parallel to the longitudinal guide rail 13. The right wall panel assembly 9 has a position locking pin 22, which can lock the right wall panel assembly 9 in a fixed position on the longitudinal guide rail 13. It can be moved on the longitudinal guide rail 13 by manual pushing.

[0048] The support mechanism in the combined tooling of this invention, such as Figure 5 As shown, several sets of support mechanisms 14 are also provided between the left wall panel assembly 8 and the right wall panel assembly 9. Each set of support mechanisms 14 includes two support mechanisms 14, which are arranged parallel to the left wall panel assembly 8. The support mechanism 14 is a telescopic mechanism, fixed on the platform according to the spacing of the main wall panels 3. After the main wall panels 3 are moved to the position using the left wall panel assembly 8, the support mechanism 14 supports the main wall panels 3. The support mechanism 14 includes a telescopic rod 23 and a base 24. Both the telescopic rod 23 and the base 24 are T-shaped structures. One end of the plane of the base 24 is fixed to the platform, and the other end is axially fitted with the telescopic rod 23. A locking bolt is provided radially at the end of the base 24 where the telescopic rod 23 is fitted. The base 24 is installed on the platform in the middle of the tooling according to the spacing of the main wall panels 3. The telescopic rod 23 can extend and retract on the base 24 and can be locked with the locking bolt. When in use, after the left wall panel assembly 8 clamps the main wall panel 3 and moves it to the position, the telescopic rod 23 is raised to contact the main wall panel 3. Then the locking bolt is rotated to lock the telescopic rod 23, which supports the main wall panel 3 and prevents the main wall panel 3 from sinking after the left wall panel assembly 8 is removed. The telescopic rod 23 also adapts to the manufacturing error of the contour of the main wall panel 3 by extending and retracting.

[0049] The present invention provides a mid-spacing positioning device for combined tooling, such as... Figure 6As shown, it also includes several spacing positioning devices 15, each of which includes two sets of clamping bolts 25. Each set of clamping bolts 25 is symmetrically arranged on both sides of the main wall panel 3, and can be rotated to clamp and fix one main wall panel 3. The spacing between the two sets is the same as the theoretical spacing of the main wall panels 3. The two sets of clamping bolts 25 can fix two adjacent main wall panels 3. The spacing manufacturing error can be adapted by rotating the bolts.

[0050] The front partial structure of the combined tooling of the present invention, such as Figure 7 As shown, front positioning posts 19 are symmetrically arranged on the front wall panel assembly 10 and the rear wall panel assembly 11. The front wall panel assembly 10 is installed on the transverse guide rail 12. The side of the front wall panel 1 is flush with the surface of the front wall panel assembly 10, which controls the perpendicularity of the side of the front wall panel 1 to the transverse guide rail 12. The front positioning posts 19 on the front wall panel assembly 10 are used for positioning based on the contour of the front wall panel 1, controlling the lateral position of the front wall panel 1. By sliding on the transverse guide rail 12, the front wall panel 1 is made to be flush with the front straight edge of the main wall panel 3. The front straight edge of the main wall panel 3 is used for longitudinal positioning of the front wall panel 1. The structure and usage of the rear wall panel assembly 11 are the same as those of the front wall panel assembly 10, and the front positioning posts 19 are installed according to the contour of the rear wall panel 5.

[0051] The support rib positioning block in the combined tooling of this invention, such as Figure 8 As shown, it also includes a support rib positioning block 26, which has an "I" shaped structure. The support rib 2 is dimensionally controlled using the support rib positioning block 26 and positioned using the end face of the front wall panel 1. The distance between the two end faces is the distance from the side of the support rib 2 to the side of the front wall panel 1. In use, one end face of the support rib positioning block 26 is pressed tightly against the side of the front wall panel 1, and the other end face is pressed firmly against the side of the support rib 2, ensuring that the distance from the support rib 2 to the front wall panel 1 is consistent and the panel surface is parallel to the front wall panel 1. The upper and lower dimensions are flush with the upper and lower end faces of the main wall panel, satisfying the positioning of the position and direction of the support rib 2.

[0052] This invention relates to a combined tooling for the mass production of reciprocating pump frames, and its working process is as follows:

[0053] Bearing seat 3-1 is machined as a single piece, with a small machining allowance for the inner hole and thickness; wall panel 3-2 is cut, with a small machining allowance for the straight edges at both ends; bearing seat 3-1 and wall panel 3-2 are welded together with the hole centerline as the reference, and the overall flatness error after welding is controlled to be ≤2mm; the straight edges and bevels at both ends of the main wall panel 3 are machined to ensure the consistency of the overall length dimension of the main wall panel 3, the position dimension of the bearing seat hole centerline, and the bevel dimension; the front wall panel 1, rear wall panel 5, and support rib 2 are cut by CNC cutting, and the plate surface is leveled after cutting to ensure that the flatness error is ≤1.5mm, and to ensure the consistency of the longitudinal position and welding gap of the weld with the main wall panel 3.

[0054] Place the front wall panel 1 on the front wall panel assembly 10, ensuring the side of the front wall panel 1 is flush against the front wall panel assembly 10. Position it using the positioning pin 19 and tighten it with bolts. Place the rear wall panel 5 on the rear wall panel assembly 11, ensuring the panel surfaces are flush against each other and tightening it. Lock the right wall panel assembly 9 in position on the longitudinal guide rail 13 using the positioning pin 22. Adjust the three-jaw chuck 17 on the right wall panel assembly 9 so that the outer diameter of the jaws is smaller than the inner diameter of the bearing seat 3-1. Place the main wall panel flush against the right wall panel assembly, ensuring the positioning pin 18 contacts the inner contour of the main wall panel 3. Adjust the three-jaw chuck to support the machined inner hole of the bearing seat for centering. Adjust the left wall panel... The three-jaw chuck 17 on the plate assembly 8 is adjusted so that the outer diameter of the jaws is smaller than the inner diameter of the bearing seat 3-1. Another main wall plate 3 is placed into the left wall plate assembly 8, so that the side of the main wall plate 3 is close to the left wall plate assembly 8. The positioning post 18 contacts the inner contour of the main wall plate 3. The three-jaw chuck is adjusted to support the bearing seat and machine the inner hole for centering. The servo motor 20 drives the left wall plate assembly 8 to move on the longitudinal guide rail 13 to the theoretical position of the main wall plate 3. Then, the telescopic rod 23 in the support mechanism 14 extends and contacts the main wall plate 3. The telescopic rod 23 is locked with the locking bolt on the base 24. The spacing positioning device 15 is then engaged between the two adjacent plates. On the main wall panel 3, the rotating bolt 25 is used to position and clamp the main wall panel 3. Then, the three-jaw chuck 17 on the left wall panel assembly 8 is retracted to remove the left wall panel assembly 8. Using the left wall panel assembly, the remaining main wall panels 3 are installed sequentially according to the steps described in this article. After each main wall panel 3 is positioned, the front wall panel assembly 10 is slid on the transverse guide rail 12 to make the side of the front wall panel 1 flush with the front straight edge of the main wall panel 3. The rear wall panel assembly 11 is slid on the transverse guide rail 12 to make the side of the rear wall panel 5 flush with the rear straight edge of the main wall panel 3. Spot welding is then used to fix the rear wall panel 5. The support rib 2 is placed in position first, and the support rib positioning block 2 is then placed in position. 6. Place the support rib between the support rib and the front wall panel, ensuring that one side of the support rib positioning block 26 is flush with the side of the front wall panel 1 and the other side is flush with the side of the support rib 2. Ensure that the support rib 2 and the front wall panel 1 are parallel and that the upper and lower ends of the support frame are flush with the upper and lower ends of the main wall panel. Use an electric welding machine to spot weld and fix it. Shrink the three-jaw chuck 17 on the right wall panel assembly 9, remove the positioning pin of the right wall panel assembly, and slide the right wall panel assembly 9 to remove the right wall panel assembly 9 from the main wall panel 3. Then, remove the remaining fixtures in sequence, move the main frame of the machine frame to the welding station of the welding robot for welding, and assemble the remaining accessories.

[0055] This invention relates to a modular tooling for the mass production of reciprocating pump frames. It can adapt to box-frame products similar to plunger pump frames with different bore diameters and spacing dimensions. The tooling uses mutually perpendicular longitudinal guide rails 13 and transverse guide rails 12 as installation references. The center of the positioning holes is located by a three-jaw chuck 17 on the left and right wall panel assemblies 8 and 9. Continuous movement of the left and right wall panel assemblies 8 and 9 on the longitudinal guide rails 13 achieves control over the axial positioning dimensions of the holes. The adjustable range of the three-jaw chuck 17 can accommodate plunger pump frame assemblies with different bearing housing inner diameters 3-1. During spacing positioning, the locked position of the right wall panel assembly 9 is used as a reference. The left wall panel assembly 8 is driven by a servo motor 20 in the traveling mechanism 16. The traveling accuracy of the servo motor 20 with gears and the rack 21 in the traveling mechanism 16 meets the positioning accuracy requirements for different spacing dimensions, thus achieving control over the axial dimensions. By utilizing the continuous movement of the front wall panel assembly 10 and the rear wall panel assembly 11 on the transverse guide rail 12, it is also possible to expand the adaptability to different longitudinal lengths, and different sizes of front positioning posts 19 can be manufactured according to the actual contour dimensions. This can meet the needs of rack combinations of different sizes, and also meet the needs of batch combination and positioning of similar box racks.

[0056] The tooling positioning ensures the dimensional accuracy of the machine frame's machining parts, and the single-part manufacturing method ensures the relative positional dimensional accuracy of the machining and welding parts, which in turn ensures the positional dimensional accuracy of the weld. The repeatability of the tooling positioning accuracy ensures the consistency of the machine frame assembly batch.

Claims

1. A combination tooling for mass production of reciprocating pump frames, characterized in that, It includes two transverse guide rails (12) and two longitudinal guide rails (13), the two transverse guide rails (12) and the two longitudinal guide rails (13) forming a rectangular structure; A left wall panel assembly (8) is provided at one end of the two longitudinal guide rails (13), and a right wall panel assembly (9) is provided at the other end. The left wall panel assembly (8) and the right wall panel assembly (9) are perpendicular to the longitudinal guide rails (13) respectively. A walking mechanism (16) is provided between the left wall panel assembly (8) and one of the longitudinal guide rails (13). A front wall panel assembly (10) is provided at one end of the two transverse guide rails (12), and a rear wall panel assembly (11) is provided at the other end. The front wall panel assembly (10) and the rear wall panel assembly (11) are perpendicular to the transverse guide rails (12), and the front wall panel assembly (10) is provided on the side close to the walking mechanism (16). Several sets of support mechanisms (14) are also provided between the left wall panel assembly (8) and the right wall panel assembly (9). Each set of support mechanisms (14) includes two support mechanisms (14), and the two support mechanisms (14) are arranged in parallel with the left wall panel assembly (8). It also includes several spacing positioning devices (15), each of which includes two sets of clamping bolts (25); It also includes a support rib positioning block (26), which is an "I" shaped structure; Place the front wall panel (1) on the front wall panel assembly (10) and tighten it with bolts; place the rear wall panel (5) on the rear wall panel assembly (11), and tighten it after the panel surfaces are firmly attached; lock the right wall panel assembly (9) on the longitudinal guide rail (13), adjust the right wall panel assembly (9), and place the main wall panel close to the right wall panel assembly; adjust the left wall panel assembly (8), place another main wall panel (3) into the left wall panel assembly (8), so that the side of the main wall panel (3) is close to the left wall panel assembly (8), the support mechanism (14) contacts the main wall panel (3), and the spacing positioning device (15) is clamped on the two adjacent main wall panels (3). Rotate the bolt (25) to position and clamp the main wall panel (3), then retract the left wall panel assembly (8), remove the left wall panel assembly (8), and install the left wall panel assembly in sequence according to the steps in this article. The remaining main wall panels (3); after each main wall panel (3) is positioned, the front wall panel assembly (10) is slid on the transverse guide rail (12) so that the side of the front wall panel (1) is in contact with the front straight edge of the main wall panel (3), and the rear wall panel assembly (11) is slid on the transverse guide rail (12) so that the side of the rear wall panel (5) is in contact with the rear straight edge of the main wall panel (3). Spot welding is performed using an electric welding machine to fix it; the support rib positioning block (26) is placed between the support rib and the front wall panel, and the upper and lower ends of the support frame are flush with the upper and lower surfaces of the main wall panel. Spot welding is performed using an electric welding machine to fix it; the right wall panel assembly (9) is retracted, the right wall panel assembly positioning pin is removed and the right wall panel assembly (9) is slid to remove the right wall panel assembly (9) from the main wall panel (3), and then the remaining fixtures are removed in sequence. The main frame of the machine frame is moved to the welding station of the welding robot for welding, and the remaining accessories are assembled.

2. The combined tooling according to claim 1, characterized in that, The walking mechanism (16) includes a servo motor (20) mounted on the left wall panel assembly (8), the output shaft of the servo motor (20) is provided with a gear, and a rack (21) is fixed on one of the longitudinal guide rails (13), the gear and the rack (21) meshing.

3. The combined tooling according to claim 1, characterized in that, The left wall panel assembly (8) and the right wall panel assembly (9) are respectively symmetrically provided with a three-jaw chuck (17) and a side positioning post (18), and the side positioning post (18) is located on the side close to the walking mechanism (16).

4. The combined tooling according to claim 3, characterized in that, The right wall panel assembly (9) is also provided with a positioning pin (22).

5. The combined tooling according to claim 1, characterized in that, Front positioning posts (19) are symmetrically arranged on the front wall panel assembly (10) and the rear wall panel assembly (11).

6. The combined tooling according to claim 1, characterized in that, The support mechanism (14) includes a telescopic rod (23) and a base (24). Both the telescopic rod (23) and the base (24) are T-shaped structures. One end of the base (24) is fitted with the telescopic rod (23) along the axial direction.

7. The combined tooling according to claim 6, characterized in that, The base (24) has a locking bolt radially arranged at one end of the inner telescopic rod (23).

Images