Combined tool for batch production of reciprocating pump racks

Abstract

The invention discloses a combined tool for batch production of reciprocating pump racks, which comprises two transverse guide rails and two longitudinal guide rails, and the two transverse guide rails and the two longitudinal guide rails form a rectangular structure; a left wallboard assembly is arranged at one ends of the two longitudinal guide rails, a right wallboard assembly is arranged at the other ends of the two longitudinal guide rails, the left wallboard assembly and the right wallboard assembly are perpendicular to the longitudinal guide rails respectively, and a walking mechanism is arranged between the left wallboard assembly and one of the longitudinal guide rails; a front wallboard assembly is arranged at one end of each transverse guide rail, a rear wallboard assembly is arranged at the other end of each transverse guide rail, the front wallboard assemblies and the rear wallboard assemblies are perpendicular to the transverse guide rails respectively, and the front wallboard assemblies are arranged on the side close to the walking mechanism. According to the combined tool for batch production of the reciprocating pump rack, the machining part is positioned, the assembly welding precision is guaranteed, the requirement of a welding robot for the consistency of the welding part is met, meanwhile, the tool is used for positioning, repeated size measurement is avoided, and the combination efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of combined tooling equipment and relates to combined tooling for batch production of reciprocating pump frames. Background Art

[0002] The fracturing pump is the core equipment of the fracturing and acidizing vehicle group, with the characteristics of 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 fracturing market demand, the conventional method of manual assembly and welding of 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 multi-cylinder crankshaft connecting rod reciprocating pump of the plunger pump has a frame that is welded by multiple wall panels. There are many processing parts on the frame, and the shape and position dimensional accuracy requirements of each processing part are relatively high. The welding size deviation leads to uneven processing allowance during overall processing, and uneven living size of each part after processing, resulting in increased product weight. The plunger pump has very high requirements for weight control, otherwise it will affect the use of the fracturing vehicle group; secondly, due to the space limitation, the lubricating oil hole and gland hole on the bearing seat can only be processed in one piece, and the welding size deviation will cause the oil groove after overall processing and the lubricating oil hole processed in one piece to be misaligned, and the bearing gland cannot be installed, which will affect the product quality. Welding robots are mainly used for single-piece mass production in assembly lines, and have high requirements for the repetitive accuracy of test pieces. The current automatic deviation correction capability of welding robots is limited, and the combination accuracy requirements of workpieces before welding are very high, which is mainly reflected in: 1) the consistency of the position size, groove and combination gap of a single weld; 2) the consistency of the combination size of batch pump frames; conventional manual combination methods are difficult to meet the requirements of robot welding.

[0004] Therefore, a combination tooling is needed that can meet the mass production of the frame, which can not only meet the precision requirements of the processing part size, but also meet the robot welding requirements for grooves, combination gaps, position dimensions, batch consistency, etc., and can also meet the mass production requirements for combination efficiency. Summary of the invention

[0005] The purpose of the present invention is to provide a combined tooling for mass production of reciprocating pump frames, which solves the problem that the existing reciprocating pump frames have many processing parts and low combination accuracy.

[0006] The technical solution adopted by the present invention is a combined tooling for mass production of a reciprocating pump frame, comprising two transverse guide rails and two longitudinal guide rails, wherein the two transverse guide rails and the two longitudinal guide rails form a rectangular structure;

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

[0008] A front wall panel assembly is arranged at one end of the two transverse guide rails, and a rear wall panel assembly is arranged at the other end. The front wall panel assembly and the rear wall panel assembly are respectively perpendicular to the transverse guide rails, and the front wall panel assembly is arranged on a side close to the walking mechanism.

[0009] The present invention is also characterized in that:

[0010] The walking mechanism comprises a servo motor installed on the left wall panel assembly, a gear is arranged on the output shaft of the servo motor, a rack is fixed on one of the longitudinal guide rails, and the gear and the rack are meshed.

[0011] The left wall panel assembly and the right wall panel assembly are symmetrically provided with a three-claw chuck and a side positioning column, and the side positioning column is arranged on a side close to the walking mechanism.

[0012] A positioning pin is also provided on the right wall panel assembly.

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

[0014] Several groups of supporting mechanisms are also arranged between the left wall panel assembly and the right wall panel assembly. Each group of supporting mechanisms includes two supporting mechanisms, and the two supporting mechanisms are arranged in parallel with the left wall panel assembly.

[0015] The supporting mechanism comprises a telescopic rod and a base. Both the telescopic rod and the base are T-shaped structures. One end of the base is axially sleeved with the telescopic rod.

[0016] The base is provided with a locking bolt in the radial direction at one end of the inner sleeve telescopic rod.

[0017] It also includes a plurality of spacing positioning devices, each of which includes two groups of clamping bolts.

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

[0019] The beneficial effects of the present invention are:

[0020] (1) Design combined tooling to position the bearing seat and other processing parts to ensure the dimensional accuracy of the processing parts and meet the overall processing allowance requirements after the frame is welded.

[0021] (2) The inner hole and overall length of the bearing seat on the main wall panel are machined as a single component to ensure the consistency of the dimensions of the processed part of the bearing seat and the weld parts at both ends, and control the flatness of the panel surface to ensure the consistency of the position dimensions, grooves and combined gaps of each weld on the main wall panel. Other parts control the flatness of the panel surface to ensure the relative dimensional accuracy of the welds and the consistency of the combined gaps.

[0022] (3) By combining the positioning of the combined tooling with the consistency of the size of the single component, the welding robot's requirements for the consistency of the welding parts are met, and the batch consistency requirements are met through the repeated positioning accuracy of the tooling. At the same time, the positioning of the tooling is used to avoid repeated dimensional measurements and improve the combination efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural diagram of a reciprocating pump frame;

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

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

[0026] Figure 4 It is a structural schematic diagram of the left part of the combined tooling of the present invention;

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

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

[0029] Figure 7 It is a schematic structural diagram of the front part of the combined tooling of the present invention;

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

[0031] In the figure, 1. front wall panel, 2. supporting ribs, 3. main wall panel, 3-1. bearing seat, 3-2. wall panel body, 4. bearing cover 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 rails, 13. longitudinal guide rails, 14. supporting mechanism, 15. spacing positioning device, 16. walking 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. supporting rib positioning block. DETAILED DESCRIPTION

[0032] The present invention is described in detail below 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, supporting ribs 2, a main wall panel 3 and a rear wall panel 5. The main wall panel 3 is composed of a bearing seat 3-1 and a wall panel body 3-2. The bearing seat 3-1 is provided with a bearing cover hole 4, a lubricating oil hole 7 and an oil groove 6. The bearing seat 3-1 is machined as a single piece, and the bearing cover hole 4 and the lubricating oil hole 7 are machined. A small amount of overall machining allowance is left for the inner hole and thickness of the bearing seat 3-1; the wall panel body 3-2 is cut by a CNC cutting machine, and a small amount of machining allowance is left for the straight edges at both ends of the wall panel body 3-2. After cutting, the panel surface is leveled with an error of ≤1.5mm; the bearing seat 3-1 and the wall panel body 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 lateral position of the weld; the main wall panel 3 is clamped based on the machined inner hole of the bearing seat 3-1 and the straight edges and bevels at both ends of the wall panel body 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 center line of the bearing seat hole and the straight edges at both ends, thereby ensuring the consistency of the longitudinal position of the weld and the consistency of the combined gap.

[0035] The present invention is used for the combined tooling for mass production of reciprocating pump racks, such as Figure 3 As shown, it includes two transverse guide rails 12 and two longitudinal guide rails 13, and the two transverse guide rails 12 and the two longitudinal guide rails 13 form a rectangular structure; a left wall panel assembly 8 is arranged at one end of the two longitudinal guide rails 13, and a right wall panel assembly 9 is arranged at the other end, and the left wall panel assembly 8 and the right wall panel assembly 9 are respectively perpendicular to the longitudinal guide rails 13, and a running mechanism 16 is arranged 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 the position of the left wall panel assembly 8 on the longitudinal guide rail 13 can be controlled by the running mechanism 16, and the right wall panel assembly 9 can also move continuously on the longitudinal guide rail 13, and the position can be locked by the positioning pin 22. A front wall panel assembly 10 is arranged at one end of the two transverse guide rails 12, and a rear wall panel assembly 11 is arranged at the other end, and the front wall panel assembly 10 and the rear wall panel assembly 11 are respectively perpendicular to the transverse guide rails 12, and the front wall panel assembly 10 is arranged on the side close to the running 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 side surfaces 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 installed on the left wall panel assembly 8, and a gear is set on the output shaft of the servo motor 20. A rack 21 is fixed on one of the longitudinal guide rails 13, and the gear and the rack 21 are meshed; the gear is driven to rotate by the servo motor 20, and the left wall panel assembly 8 can be controlled to move and position on the longitudinal guide rail 13 through the meshing of the gear and the rack 21.

[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, supporting ribs 2, a main wall panel 3 and a rear wall panel 5. The main wall panel 3 is composed of a bearing seat 3-1 and a wall panel body 3-2. The bearing seat 3-1 is provided with a bearing cover hole 4, a lubricating oil hole 7 and an oil groove 6. The bearing seat 3-1 is machined as a single piece, and the bearing cover hole 4 and the lubricating oil hole 7 are machined. A small amount of overall machining allowance is left for the inner hole and thickness of the bearing seat 3-1; the wall panel body 3-2 is cut by a CNC cutting machine, and a small amount of machining allowance is left for the straight edges at both ends of the wall panel body 3-2. After cutting, the panel surface is leveled with an error of ≤1.5mm; the bearing seat 3-1 and the wall panel body 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 lateral position of the weld; the main wall panel 3 is clamped based on the machined inner hole of the bearing seat 3-1 and the straight edges and bevels at both ends of the wall panel body 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 center line of the bearing seat hole and the straight edges at both ends, thereby ensuring the consistency of the longitudinal position of the weld and the consistency of the combined gap.

[0039] The present invention is used for the combined tooling for mass production of reciprocating pump racks, such as Figure 3 As shown, it includes two transverse guide rails 12 and two longitudinal guide rails 13, and the two transverse guide rails 12 and the two longitudinal guide rails 13 form a rectangular structure; a left wall panel assembly 8 is arranged at one end of the two longitudinal guide rails 13, and a right wall panel assembly 9 is arranged at the other end, and the left wall panel assembly 8 and the right wall panel assembly 9 are respectively perpendicular to the longitudinal guide rails 13, and a running mechanism 16 is arranged 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 the position of the left wall panel assembly 8 on the longitudinal guide rail 13 can be controlled by the running mechanism 16, and the right wall panel assembly 9 can also move continuously on the longitudinal guide rail 13, and the position can be locked by the positioning pin 22. A front wall panel assembly 10 is arranged at one end of the two transverse guide rails 12, and a rear wall panel assembly 11 is arranged at the other end, and the front wall panel assembly 10 and the rear wall panel assembly 11 are respectively perpendicular to the transverse guide rails 12, and the front wall panel assembly 10 is arranged on the side close to the running 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 side surfaces 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 installed on the left wall panel assembly 8, and a gear is set on the output shaft of the servo motor 20. A rack 21 is fixed on one of the longitudinal guide rails 13, and the gear and the rack 21 are meshed; the gear is driven to rotate by the servo motor 20, and the left wall panel assembly 8 can be controlled to move and position on the longitudinal guide rail 13 through the meshing of the gear and the rack 21.

[0041] The local structure on the left side of the combined tooling of the present invention is as follows: Figure 4As shown, the left wall panel assembly 8 and the right wall panel assembly 9 are symmetrically provided with a three-jaw chuck 17 and a side positioning column 18, respectively. The side positioning column 18 is provided near the side of the walking mechanism 16; the right wall panel assembly 9 is also provided with a positioning pin 22. The left wall panel assembly 8 has a three-jaw chuck 17 and a side positioning column 18. When in use, the side surface of the bearing seat 3-1 on the main wall panel 3 is firmly attached to the side surface of the left wall panel assembly 8, so that the axial direction of the bearing seat 3-1 is controlled to be parallel to the longitudinal guide rail 13. The three-jaw chuck 17 is used to center the inner hole processing surface of the bearing seat. The side positioning column 18 uses the inner contour of the wall panel body 3-2 to locate the front end height of the main wall panel 3, so that the radial positioning size position of the bearing seat 3-1 is controlled. The left wall panel assembly 8 slides continuously on the longitudinal guide rail 13, and the radial positioning size and axial direction of each bearing seat 3-1 are positioned in turn, so that multiple bearing seats 3-1 are ensured to be concentric and the axis is parallel to the longitudinal guide rail 13. The servo motor 20 of the walking mechanism 16 is used to control the position of the left wall panel assembly 8 on the longitudinal guide rail 13, and thus the axial position of the main wall panel 3 can be controlled. The right wall panel assembly 9 is symmetrical to the left wall panel assembly 8, and 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 the axis is parallel to the longitudinal guide rail 13. The right wall panel assembly 9 is provided with a position locking locating pin 22, which can lock the right wall panel assembly 9 at a fixed position on the longitudinal guide rail 13, and can be moved on the longitudinal guide rail 13 by human force.

[0042] The supporting mechanism in the combined tooling of the present invention is as follows: Figure 5 As shown, a plurality of groups of support mechanisms 14 are also arranged between the left wall panel assembly 8 and the right wall panel assembly 9, each group 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. The support mechanism 14 is a telescopic mechanism, which is 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 by the left wall panel assembly 8, the support mechanism 14 is used to support the main wall panels 3. The support mechanism 14 includes a telescopic rod 23 and a base 24, both of which are T-shaped structures, one end of the plane of the base 24 is fixed on the platform, and the other end is axially sleeved with the telescopic rod 23, and the base 24 is provided with a locking bolt radially at one end of the inner sleeve of the telescopic rod 23. The base 24 is installed on the platform in the middle of the tooling according to the spacing between the main wall panels 3. The telescopic rod 23 can be telescoped on the base 24 and can be locked with a locking bolt. When in use, after the left wall panel assembly 8 clamps the main wall panel 3 and moves to the position, the telescopic rod 23 is raised to contact the main wall panel 3, and then the locking bolt is rotated to lock the telescopic rod 23 to support the main wall panel 3, thereby preventing the main wall panel 3 from sinking after the left wall panel assembly 8 is withdrawn. The telescopic rod 23 can also be used to extend and retract up and down to adapt to the manufacturing error of the outline of the main wall panel 3.

[0043] Example 3

[0044] The structure of the reciprocating pump frame, such as Figure 1 and Figure 2 As shown, it includes a front wall panel 1, supporting ribs 2, a main wall panel 3 and a rear wall panel 5. The main wall panel 3 is composed of a bearing seat 3-1 and a wall panel body 3-2. The bearing seat 3-1 is provided with a bearing cover hole 4, a lubricating oil hole 7 and an oil groove 6. The bearing seat 3-1 is machined as a single piece, and the bearing cover hole 4 and the lubricating oil hole 7 are machined. A small amount of overall machining allowance is left for the inner hole and thickness of the bearing seat 3-1; the wall panel body 3-2 is cut by a CNC cutting machine, and a small amount of machining allowance is left for the straight edges at both ends of the wall panel body 3-2. After cutting, the panel surface is leveled with an error of ≤1.5mm; the bearing seat 3-1 and the wall panel body 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 lateral position of the weld; the main wall panel 3 is clamped based on the machined inner hole of the bearing seat 3-1 and the straight edges and bevels at both ends of the wall panel body 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 center line of the bearing seat hole and the straight edges at both ends, thereby ensuring the consistency of the longitudinal position of the weld and the consistency of the combined gap.

[0045] The present invention is used for the combined tooling for mass production of reciprocating pump racks, such as Figure 3 As shown, it includes two transverse guide rails 12 and two longitudinal guide rails 13, and the two transverse guide rails 12 and the two longitudinal guide rails 13 form a rectangular structure; a left wall panel assembly 8 is arranged at one end of the two longitudinal guide rails 13, and a right wall panel assembly 9 is arranged at the other end, and the left wall panel assembly 8 and the right wall panel assembly 9 are respectively perpendicular to the longitudinal guide rails 13, and a running mechanism 16 is arranged 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 the position of the left wall panel assembly 8 on the longitudinal guide rail 13 can be controlled by the running mechanism 16, and the right wall panel assembly 9 can also move continuously on the longitudinal guide rail 13, and the position can be locked by the positioning pin 22. A front wall panel assembly 10 is arranged at one end of the two transverse guide rails 12, and a rear wall panel assembly 11 is arranged at the other end, and the front wall panel assembly 10 and the rear wall panel assembly 11 are respectively perpendicular to the transverse guide rails 12, and the front wall panel assembly 10 is arranged on the side close to the running 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 side surfaces 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 installed on the left wall panel assembly 8, and a gear is set on the output shaft of the servo motor 20. A rack 21 is fixed on one of the longitudinal guide rails 13, and the gear and the rack 21 are meshed; the gear is driven to rotate by the servo motor 20, and the left wall panel assembly 8 can be controlled to move and position on the longitudinal guide rail 13 through the meshing of the gear and the rack 21.

[0047] The local structure on the left side of the combined tooling of the present invention is as follows: Figure 4As shown, the left wall panel assembly 8 and the right wall panel assembly 9 are symmetrically provided with a three-jaw chuck 17 and a side positioning column 18, respectively. The side positioning column 18 is provided near the side of the walking mechanism 16; the right wall panel assembly 9 is also provided with a positioning pin 22. The left wall panel assembly 8 has a three-jaw chuck 17 and a side positioning column 18. When in use, the side surface of the bearing seat 3-1 on the main wall panel 3 is firmly attached to the side surface of the left wall panel assembly 8, so that the axial direction of the bearing seat 3-1 is controlled to be parallel to the longitudinal guide rail 13. The three-jaw chuck 17 is used to center the inner hole processing surface of the bearing seat. The side positioning column 18 uses the inner contour of the wall panel body 3-2 to locate the front end height of the main wall panel 3, so that the radial positioning size position of the bearing seat 3-1 is controlled. The left wall panel assembly 8 slides continuously on the longitudinal guide rail 13, and the radial positioning size and axial direction of each bearing seat 3-1 are positioned in turn, so that multiple bearing seats 3-1 are ensured to be concentric and the axis is parallel to the longitudinal guide rail 13. The servo motor 20 of the walking mechanism 16 is used to control the position of the left wall panel assembly 8 on the longitudinal guide rail 13, and thus the axial position of the main wall panel 3 can be controlled. The right wall panel assembly 9 is symmetrical to the left wall panel assembly 8, and 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 the axis is parallel to the longitudinal guide rail 13. The right wall panel assembly 9 is provided with a position locking locating pin 22, which can lock the right wall panel assembly 9 at a fixed position on the longitudinal guide rail 13, and can be moved on the longitudinal guide rail 13 by human force.

[0048] The supporting mechanism in the combined tooling of the present invention is as follows: Figure 5 As shown, a plurality of groups of support mechanisms 14 are also arranged between the left wall panel assembly 8 and the right wall panel assembly 9, each group 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. The support mechanism 14 is a telescopic mechanism, which is 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 by the left wall panel assembly 8, the support mechanism 14 is used to support the main wall panels 3. The support mechanism 14 includes a telescopic rod 23 and a base 24, both of which are T-shaped structures, one end of the plane of the base 24 is fixed on the platform, and the other end is axially sleeved with the telescopic rod 23, and the base 24 is provided with a locking bolt radially at one end of the inner sleeve of the telescopic rod 23. The base 24 is installed on the platform in the middle of the tooling according to the spacing between the main wall panels 3. The telescopic rod 23 can be telescoped on the base 24 and can be locked with a locking bolt. When in use, after the left wall panel assembly 8 clamps the main wall panel 3 and moves to the position, the telescopic rod 23 is raised to contact the main wall panel 3, and then the locking bolt is rotated to lock the telescopic rod 23 to support the main wall panel 3, thereby preventing the main wall panel 3 from sinking after the left wall panel assembly 8 is withdrawn. The telescopic rod 23 can also be used to extend and retract up and down to adapt to the manufacturing error of the outline of the main wall panel 3.

[0049] The spacing positioning device of the combined tooling of the present invention is as follows: Figure 6As shown, it also includes a plurality of spacing positioning devices 15, each spacing positioning device 15 includes two groups of clamping bolts 25. Each group of clamping bolts 25 is symmetrically arranged on both sides of the main wall panel 3, and can fix one main wall panel 3 by rotating and clamping. The spacing between the two groups is the same as the theoretical spacing of the main wall panels 3. The two groups of clamping bolts 25 can fix two adjacent main wall panels 3, and the spacing manufacturing error can be adapted by the rotation adjustment of the bolts.

[0050] The front side partial structure of the combined tooling of the present invention is as follows: Figure 7 As shown, front positioning columns 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, and the side of the front wall panel 1 is firmly attached to the surface of the front wall panel assembly 10, so that the side of the front wall panel 1 is controlled to be perpendicular to the transverse guide rail 12. The front positioning columns 19 are arranged on the front wall panel assembly 10, and the contour of the front wall panel 1 is used for positioning, so as to control the transverse position of the front wall panel 1. By sliding on the transverse guide rail 12, the front wall panel 1 is tightly attached to the front straight edge of the main wall panel 3, and the front wall panel 1 is longitudinally positioned using the machined front straight edge of the main wall panel 3. 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 columns 19 are installed according to the contour of the rear wall panel 5.

[0051] The support rib positioning block in the combined tooling of the present invention is as follows Figure 8 As shown, it also includes a support rib positioning block 26, which is an "I"-shaped structure. The support rib 2 uses the support rib positioning block 26 for size control, and uses the end face of the front wall panel 1 for positioning. 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. When in use, one end face of the support rib positioning block 26 is tightly attached to the side of the front wall panel 1, and the other end face is firmly attached to the side of the support rib 2, ensuring that the distance between the support rib 2 and 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, which satisfies the positioning of the position and direction of the support rib 2.

[0052] The combined tooling of the present invention is used for batch production of reciprocating pump frames, and its working process is as follows:

[0053] The bearing seat 3-1 is processed as a single piece, with a small amount of processing allowance left for the inner hole and thickness; the wall panel body 3-2 is cut, with a small amount of processing allowance left for the straight edges at both ends; the bearing seat 3-1 and the wall panel body 3-2 are welded together with the center line of the hole 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 processed to ensure the consistency of the overall length dimension of the main wall panel 3, the position dimension of the center line of the bearing seat hole and the bevel dimension; the front wall panel 1, the rear wall panel 5 and the supporting rib 2 are cut by CNC cutting, and the panel surface is leveled after cutting to ensure that the flatness error is ≤1.5mm, and the consistency of the longitudinal position of the weld and the welding gap with the main wall panel 3 is ensured.

[0054] Place the front wall panel 1 on the front wall panel assembly 10, with the side of the front wall panel 1 pressed against the front wall panel assembly 10, use the positioning column 19 to position it, and tighten it with bolts; place the rear wall panel 5 on the rear wall panel assembly 11, and position and tighten it after the panel surface is pressed against each other; lock the position of the right wall panel assembly 9 with the positioning pin 22 on the longitudinal guide rail 13, adjust the three-jaw chuck 17 on the right wall panel assembly 9 so that the outer diameter of the claw is smaller than the inner diameter of the bearing seat 3-1, place the main wall panel and the right wall panel assembly tightly, and the positioning column 18 contacts the inner contour of the main wall panel 3, adjust the three-jaw chuck to hold the processed inner hole of the bearing seat for centering; adjust the left wall The three-jaw chuck 17 on the plate assembly 8 makes the outer diameter of the claw smaller than the inner diameter of the bearing seat 3-1, and the other main wall panel 3 is placed in 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, and the positioning column 18 contacts the inner contour of the main wall panel 3. The three-jaw chuck is adjusted to tighten the inner hole of the bearing seat for centering. The servo motor 20 drives the left wall panel assembly 8 to move on the longitudinal guide rail 13 to reach the theoretical position of this main wall panel 3, and then the telescopic rod 23 in the support mechanism 14 extends out to contact the main wall panel 3, and the telescopic rod 23 is locked with the locking bolt on the base 24, and the spacing positioning device 15 is clamped in the corresponding On the two adjacent main wall panels 3, rotate the bolts 25 to position and tighten the main wall panels 3, then retract the three-claw chuck 17 on the left wall panel assembly 8, withdraw the left wall panel assembly 8, and use the left wall panel assembly to install the remaining main wall panels 3 in sequence according to the steps and methods; after each main wall panel 3 is positioned, slide the front wall panel assembly 10 on the transverse guide rail 12 to make the side of the front wall panel 1 and the front straight edge of the main wall panel 3 firmly attached, slide the rear wall panel assembly 11 on the transverse guide rail 12 to make the side of the rear wall panel 5 and the rear straight edge of the main wall panel 3 firmly attached, and use an electric welding machine to spot weld and fix; put the support ribs 2 in place first, and fix the support ribs with the support rib positioning blocks 26 is placed between the support rib and the front wall panel, so that one end side of the support rib positioning block 26 is firmly attached to the side of the front wall panel 1, and the other end side is firmly attached to the side of the support rib 2, ensuring that the support rib 2 is spaced from the front wall panel 1 and the sides are parallel, and the upper and lower ends of the support frame are flush with the upper and lower sides of the main wall panel, and are fixed by spot welding using an electric welding machine; shrink the three-jaw chuck 17 on the right wall panel assembly 9, remove the right wall panel assembly locating pin and slide the right wall panel assembly 9, so that the right wall panel assembly 9 withdraws from the main wall panel 3, and then withdraw the remaining tooling in turn, move the main frame of the rack to the welding station of the welding robot for welding, and assemble the remaining accessories.

[0055] The combined tooling used for mass production of reciprocating pump racks of the present invention can adapt to box rack products similar to plunger pump racks with different apertures and different spacing sizes. The tooling uses mutually perpendicular longitudinal guide rails 13 and transverse guide rails 12 as installation references, and uses the three-claw chuck 17 on the left wall panel assembly 8 and the right wall panel assembly 9 to locate the center of the hole. The left wall panel assembly 8 and the right wall panel assembly 9 are continuously moved on the longitudinal guide rail 13 to achieve control of the axial positioning size of the hole. The adjustment range of the three-claw chuck 17 can meet the combination of plunger pump racks with different inner diameters of the bearing seat 3-1. When spacing positioning, the locking position of the right wall panel assembly 9 is used as a reference, and the left wall panel assembly 8 is driven by the servo motor 20 in the walking mechanism 16. The walking accuracy of the servo motor 20 with gears and the rack 21 in the walking mechanism 16 meets the positioning accuracy of different spacing sizes, thereby achieving control of the axial size. By continuously moving the front wall panel assembly 10 and the rear wall panel assembly 11 on the transverse guide rail 12, the adaptability to different longitudinal lengths can be expanded, and the front positioning columns 19 of different sizes can be processed according to the actual outline size. In this way, the rack combination of different sizes can be met, and the batch combination positioning of the same type of racks can also be met.

[0056] The dimensional accuracy of the frame processing parts is ensured by tool positioning, and the relative position dimensional accuracy of the processing parts and welding parts is ensured by the single-component manufacturing method, which also ensures the position dimensional accuracy of the weld. The repeated positioning accuracy of the tooling can meet the batch consistency of the frame assembly.

Claims

1. A combined tooling for mass production of reciprocating pump racks, characterized in that: It comprises two transverse guide rails (12) and two longitudinal guide rails (13), wherein the two transverse guide rails (12) and the two longitudinal guide rails (13) form a rectangular structure; A left wall panel assembly (8) is arranged at one end of the two longitudinal guide rails (13), and a right wall panel assembly (9) is arranged at the other end; the left wall panel assembly (8) and the right wall panel assembly (9) are respectively perpendicular to the longitudinal guide rails (13); and a walking mechanism (16) is arranged between the left wall panel assembly (8) and one of the longitudinal guide rails (13); A front wall panel assembly (10) is arranged at one end of the two transverse guide rails (12), and a rear wall panel assembly (11) is arranged at the other end; the front wall panel assembly (10) and the rear wall panel assembly (11) are respectively perpendicular to the transverse guide rails (12); and the front wall panel assembly (10) is arranged on a side close to the walking mechanism (16).

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

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 symmetrically provided with a three-jaw chuck (17) and a side positioning column (18), respectively, and the side positioning column (18) is arranged close to one side of 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 columns (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: A plurality of groups of support mechanisms (14) are also provided between the left wall panel assembly (8) and the right wall panel assembly (9), each group of support mechanisms (14) comprising two support mechanisms (14), and the two support mechanisms (14) are arranged in parallel with the left wall panel assembly (8).

7. The combined tooling according to claim 6, characterized in that: The support mechanism (14) comprises a telescopic rod (23) and a base (24); the telescopic rod (23) and the base (24) are both T-shaped structures; one end of the base (24) is axially sleeved with the telescopic rod (23).

8. The combined tooling according to claim 7, characterized in that: The base (24) is provided with a locking bolt in the radial direction at one end of the inner sleeve telescopic rod (23).

9. The combined tooling according to claim 1, characterized in that: It also comprises a plurality of spacing positioning devices (15), each of the spacing positioning devices (15) comprising two groups of clamping bolts (25).

10. The combined tooling according to claim 1, characterized in that: It also includes a support rib positioning block (26), wherein the support rib positioning block (26) is an "I"-shaped structure.

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