A multi-station composite processing hydraulic tool and its processing technology

Abstract

The present invention relates to the technical field of hydraulic pump component processing, and in particular to a multi-station composite processing hydraulic tooling and its processing technology. Its tooling structure includes a tooling base, on which a first hydraulic horizontal positioning tooling station and a second hydraulic vertical positioning tooling station are respectively arranged. The first hydraulic horizontal positioning tooling station is used for horizontal positioning processing of the workpiece to be processed, and the second hydraulic vertical positioning tooling station is used for vertical positioning and reprocessing of the workpiece to be processed that has been processed on the first hydraulic horizontal positioning tooling station. On the one hand, the present invention integrates the working procedures, reduces the turnover times and clamping times of the product, greatly reduces the production time, reduces the cumulative error of the processed workpiece, greatly improves the position accuracy of the workpiece, and ensures the quality stability of the workpiece; on the other hand, the working hours are reduced, the profit margin is increased, the labor cost is reduced, the equipment occupancy rate effectively utilizes resources, and ensures the high quality of the product.

Description

Technical Field

[0001] This invention relates to the field of hydraulic pump component processing technology, particularly to the processing of hydraulic pump bodies and intermediates, and especially to a multi-station composite machining hydraulic tooling and its processing technology. Background Technology

[0002] In the batch processing of pump bodies and intermediates of small-displacement hydraulic gear pumps, the existing machining equipment and processes generally adopt manual clamping or manual longitudinal clamping, which has the following shortcomings: 1. It requires the cooperation of multiple machine tools and multiple processes to complete the processing. Each machine tool processes one piece at a time, and batch production requires a large number of machine tools and personnel, resulting in high production costs; 2. Manual clamping results in uneven clamping force, which has always restricted the stability of the product's dimensions, flatness, and other geometric tolerances; 3. When processing different series of pump bodies and intermediates, due to the differences in product shape and various parts, it is necessary to design and manufacture corresponding fixtures and pressure plates, and process them by disassembly and adjustment, resulting in very high labor and material costs.

[0003] Low cost, high efficiency, quick and convenient product replacement, and stable product quality are the technical problems that this invention aims to solve.

[0004] Currently, there are technologies for positioning using specialized tooling. However, existing machining tooling relies on secondary alignment based on external shape, and is fixed by manual bolt tightening or vise clamping. This method of fixing leads to problems such as vibration and positional deviation during machining, and the product accuracy is unstable. When it is necessary to switch to machining other product series, changing and adjusting the tooling is time-consuming and labor-intensive, requiring multiple adjustments. Similarly, with the current process, one machine and one set of tooling can only process one operation for this type of product, occupying a large number of machine tools and personnel. It also suffers from problems such as large cumulative errors in batch processing, high production costs, low production efficiency, high labor costs, and unstable product quality. Summary of the Invention

[0005] To address the problems of existing technologies, this invention provides a multi-station composite machining hydraulic tooling and its machining process. On the one hand, it integrates processes, reduces the number of product turnovers and clamping operations, significantly reduces production time, reduces cumulative errors in the machined workpiece, greatly improves the positional accuracy of the workpiece, and ensures the quality stability of the workpiece. On the other hand, reduced working hours increase profit margins, reduce labor costs, and effectively utilize resources by maximizing equipment utilization, ensuring high product quality. By improving efficiency, reducing turnover frequency, and shortening processing time, it is possible to complete workshop production tasks in a timely manner and shorten the supply cycle.

[0006] The technical solution adopted in this invention is as follows:

[0007] A multi-station composite machining hydraulic fixture includes a fixture base, on which a first hydraulic horizontal positioning fixture station and a second hydraulic vertical positioning fixture station are respectively provided. The first hydraulic horizontal positioning fixture station is used for horizontal positioning machining of the workpiece to be machined, and the second hydraulic vertical positioning fixture station is used for vertical positioning and re-machining of the workpiece to be machined after machining on the first hydraulic horizontal positioning fixture station.

[0008] Preferably, the first hydraulic horizontal positioning fixture station has at least two sets of fixtures, and the second hydraulic vertical positioning fixture station has at least two sets of fixtures.

[0009] Preferably, the first hydraulic horizontal positioning fixture station includes a first hydraulic cylinder fixed on the fixture base, the first shaft of the first hydraulic cylinder is connected to a movable jaw base that slides on a slide rail in front, the movable jaw base is provided with jaws, a fixed seat is provided on the fixture base opposite the jaws, and a workpiece positioning stake and a workpiece support shaft are also provided on the fixture base between the fixed seat and the first hydraulic cylinder.

[0010] Preferably, the second hydraulic vertical positioning fixture includes a second hydraulic cylinder fixed to the base of the fixture by a cylinder fixing bolt. The second shaft of the second hydraulic cylinder is connected to a rotating pull plate by a cylinder center bolt. The rotating pull plate is provided with a locking hole and a diagonal arc groove. The workpiece to be processed is provided with a pump body pull rod. After the pump body pull rod passes downward through the base of the fixture, it is inserted into the locking hole. By rotating the rotating pull plate, the pump body pull rod is locked in the locking hole.

[0011] Preferably, the upper end of the pump body pull rod is provided with a connecting thread for screwing into the mounting screw hole of the workpiece to be processed, and the lower end of the pump body pull rod is provided with a narrowed locking part. The locking hole is a strip-shaped hole with a larger diameter on one side and a smaller diameter on the other side. The larger diameter part is used for the pump body pull rod to be inserted, and the smaller diameter part is used for the pump body pull rod to be locked in the locking hole after the rotating pull plate rotates.

[0012] Preferably, a positioning plate is provided above the tooling base.

[0013] Preferably, the rotating pull plate is equipped with a manual lever.

[0014] Preferably, there are two pump body tie rods, which are installed diagonally at the bottom of the workpiece to be processed.

[0015] A machining process for a multi-station composite machining hydraulic tooling includes the following steps:

[0016] A. Installation of the first hydraulic horizontal positioning fixture station:

[0017] Pushing the first manual valve controls the direction of the oil circuit to control the first shaft of the first hydraulic cylinder to be in the retracted state. The workpiece to be processed is installed on the workpiece support shaft, close to the fixed seat and the workpiece positioning stake. Pulling back the first manual valve controls the first shaft of the first hydraulic cylinder to extend and clamp the workpiece to be processed.

[0018] Installation of the second hydraulic vertical positioning fixture at the workstation:

[0019] First, install the two pull rods on the diagonal threaded holes of the workpiece to be processed. Push the second hand control valve to confirm that the second shaft of the second hydraulic cylinder is in the extended state. Move the manual lever of the rotating pull plate to the 90-degree position facing the tooling base. Then, install the workpiece to be processed on the positioning plate and position it through the process pin hole. Move the manual lever of the rotating pull plate to the left to the limit position and lock the lower end of the pull rod in the diagonal arc groove of the rotating pull plate. Push the second hand control valve to make the second shaft of the second hydraulic cylinder in the retracted state. The rotating pull plate is subjected to force and slides down along the cylinder fixing sleeve to tighten the pull rod and the workpiece to be processed.

[0020] B. Start the vertical machining center, select the machining tools, and process the products according to the process on the first hydraulic horizontal positioning fixture station and the second hydraulic vertical positioning fixture station in sequence.

[0021] C. After processing is completed, push the first manual valve to control the first shaft of the first hydraulic cylinder to be in the retracted state, unload the workpiece to be processed on the first hydraulic horizontal positioning fixture station, move it to the second hydraulic vertical positioning fixture station, and repeat the steps in step A for further processing.

[0022] Push the second manual control valve to extend the second shaft of the second hydraulic cylinder. Move the manual lever of the rotating pull plate to the 90-degree position facing the tooling base. Remove the workpiece to be processed from the second hydraulic vertical positioning tooling station. Remove the pull rod from the workpiece to be processed, thus completing one processing cycle.

[0023] The beneficial effects of the technical solution provided by this invention are:

[0024] The present invention discloses a multi-station composite machining hydraulic tooling and its machining process, which can simultaneously clamp and process the front and back sides of a workpiece, completing the production from blank to finished product in one process; it not only reduces the product turnover frequency and avoids the risks of bumps and scratches during turnover, but also greatly reduces the labor intensity of workers and avoids safety risks in the processing process.

[0025] Using the multi-station composite machining hydraulic tooling of this invention improves the safety and stability of product clamping, ensures the required shape and positional accuracy of the product, and significantly increases the product qualification rate. According to the processing parameter requirements of different products, special positioning tooling is designed. By using different positioning tooling, the quick and convenient replacement of different models of products is achieved, truly achieving seamless connection, greatly reducing product production and processing time, shortening the supply cycle, and ensuring timely product delivery.

[0026] In summary, this invention is suitable for mass production with low production costs; it adopts a composite four-station hydraulic tensioning (clamping) system, which ensures high product stability and a high quality pass rate; the optimized process integrates procedures, avoids transportation risks, and reduces the labor intensity of workers; the modular design enables rapid adjustment and replacement of various pump bodies and intermediate components, resulting in high production efficiency. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the overall structure of a multi-station composite machining hydraulic tooling according to the present invention;

[0029] Figure 2 This is a schematic diagram of the first hydraulic horizontal positioning fixture station structure of a multi-station composite machining hydraulic fixture according to the present invention;

[0030] Figure 3 This is a partial cross-sectional view of a multi-station composite machining hydraulic tooling according to the present invention;

[0031] Figure 4 for Figure 1 A schematic diagram of the installation status of the workpiece to be processed;

[0032] Figure 5 This is a schematic diagram of the rotating pull plate in this invention.

[0033] In the diagram: 1. Fixture base; 2. First hydraulic horizontal positioning fixture station; 3. Second hydraulic vertical positioning fixture station; 4. Workpiece to be processed;

[0034] 21. First hydraulic cylinder; 22. First shaft core; 23. Slide rail; 24. Movable jaw base; 25. Jaws; 26. Fixed base; 27. Workpiece positioning post; 28. Workpiece support shaft;

[0035] 31. Cylinder fixing bolt; 32. Second hydraulic cylinder; 33. Second shaft core; 34. Cylinder center bolt; 35. Rotary pull plate; 36. Locking hole; 37. Diagonal arc groove; 38. Pump body tie rod; 39. Positioning plate;

[0036] 381. Connecting thread; 382. Locking part;

[0037] 351. Manual lever. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. Example 1

[0039] As attached Figure 1 , 4 As shown in the figure, a multi-station composite machining hydraulic fixture of this embodiment includes a fixture base 1. The fixture base 1 is respectively provided with a first hydraulic horizontal positioning fixture station 2 and a second hydraulic vertical positioning fixture station 3. The first hydraulic horizontal positioning fixture station 2 is used to perform horizontal positioning machining on the workpiece 4 to be machined, and the second hydraulic vertical positioning fixture station 3 is used to perform vertical positioning remachining on the workpiece 4 to be machined after it has been machined on the first hydraulic horizontal positioning fixture station 2.

[0040] In this embodiment, the first hydraulic horizontal positioning fixture station 2 is equipped with two sets of fixtures, and the second hydraulic vertical positioning fixture station 3 is equipped with two sets of fixtures, which can process two sets of components to be processed respectively.

[0041] As attached Figure 2 As shown, the first hydraulic horizontal positioning fixture station 2 in this embodiment includes a first hydraulic cylinder 21 fixed on the fixture base 1. The first shaft core 22 of the first hydraulic cylinder 21 is connected to a movable jaw base 24 that slides on a slide rail 23. A jaw 25 is provided on the movable jaw base 24. A fixed seat 26 is provided on the fixture base 1 opposite the jaw 25. A workpiece positioning post 27 and a workpiece support shaft 28 are also provided on the fixture base 1 between the fixed seat 26 and the first hydraulic cylinder 21.

[0042] The movable jaw base 24 is connected to the first shaft core 22 of the first hydraulic cylinder 21 by hex bolts, leaving a clearance for movement. It achieves extension and tightening reciprocating motion through the slide rail 23 fixed on the tooling base 1, and cooperates with the fixed seat 26 to complete the clamping and loosening actions of the first and second tooling on the left side. There are two jaws 25, which are installed on the fixed seat 26 and the movable jaw base 24 respectively. There are four workpiece support shafts 28, which are installed with the workpiece positioning stakes 27 at the designated positions on the tooling base 1 for positioning and supporting the workpiece 4 to be processed.

[0043] As attached Figure 3 As shown, the second hydraulic vertical positioning fixture 3 in this embodiment includes a second hydraulic cylinder 32 fixed to the fixture base 1 by a cylinder fixing bolt 31. The second shaft core 33 of the second hydraulic cylinder 32 is connected to a rotating pull plate 35 by a cylinder center bolt 34. The rotating pull plate 35 is provided with a locking hole 36 and a diagonal arc groove 37. The workpiece 4 to be processed is provided with a pump body pull rod 38. After the pump body pull rod 38 passes downward through the fixture base 1, it is inserted into the locking hole 36. By rotating the rotating pull plate 35, the pump body pull rod 38 is locked in the locking hole 36.

[0044] As attached Figure 5 As shown, the upper end of the pump body pull rod 38 is provided with a connecting thread 381 for screwing into the mounting screw hole of the workpiece to be processed. The lower end of the pump body pull rod 38 is provided with a narrowed locking part 382. The locking hole 36 is a strip-shaped hole with a larger diameter on one side and a smaller diameter on the other. The larger diameter part is used for inserting the pump body pull rod, and the smaller diameter part is used for locking the pump body pull rod 38 into the locking hole 36 after the rotating pull plate 35 rotates. A positioning plate 39 is provided above the tooling base 1. A manual lever 351 is provided on the rotating pull plate 35. There are two pump body pull rods 38, which are respectively installed at the bottom diagonal of the workpiece 4 to be processed.

[0045] In this embodiment, the power source for the reciprocating motion of the second hydraulic vertical positioning fixture station 3 is the second hydraulic cylinder 32. It is fixed to the lower end face of the fixture base 1 by four cylinder fixing sleeves and four cylinder fixing bolts 31. The rotating pull plate 35 is fixed together with the second hydraulic cylinder 32 by the cylinder center bolt 34. During installation, the four cylinder fixing sleeves pass sequentially through the diagonal arc grooves 37 of the rotating pull plate 35. The positioning plate 39 is installed on the upper end face of the fixture base 1 through positioning pin holes and fixed with four hexagonal bolts. The operator controls the direction of the oil circuit through a manual valve to control the extension and retraction of the second shaft core 33 of the second hydraulic cylinder 32, driving the rotating pull plate 35 to reciprocate up and down along the direction of the cylinder fixing sleeves. Example 2

[0046] This embodiment provides a machining process for a multi-station composite machining hydraulic tooling, including the following steps:

[0047] A. Installation of the first hydraulic horizontal positioning fixture station:

[0048] Pushing the first manual valve controls the direction of the oil circuit to control the first shaft of the first hydraulic cylinder to be in the retracted state. The workpiece to be processed is installed on the workpiece support shaft, close to the fixed seat and the workpiece positioning stake. Pulling back the first manual valve controls the first shaft of the first hydraulic cylinder to extend and clamp the workpiece to be processed.

[0049] Installation of the second hydraulic vertical positioning fixture at the workstation:

[0050] First, install the two pull rods on the diagonal threaded holes of the workpiece to be processed. Push the second hand control valve to confirm that the second shaft of the second hydraulic cylinder is in the extended state. Move the manual lever of the rotating pull plate to the 90-degree position facing the tooling base. Then, install the workpiece to be processed on the positioning plate and position it through the process pin hole. Move the manual lever of the rotating pull plate to the left to the limit position and lock the lower end of the pull rod in the diagonal arc groove of the rotating pull plate. Push the second hand control valve to make the second shaft of the second hydraulic cylinder in the retracted state. The rotating pull plate is subjected to force and slides down along the cylinder fixing sleeve to tighten the pull rod and the workpiece to be processed.

[0051] B. Start the vertical machining center, select the machining tools, and process the products according to the process on the first hydraulic horizontal positioning fixture station and the second hydraulic vertical positioning fixture station in sequence.

[0052] C. After processing is completed, push the first manual valve to control the first shaft of the first hydraulic cylinder to be in the retracted state, unload the workpiece to be processed on the first hydraulic horizontal positioning fixture station, move it to the second hydraulic vertical positioning fixture station, and repeat the steps in step A for further processing.

[0053] Push the second manual control valve to extend the second shaft of the second hydraulic cylinder. Move the manual lever of the rotating pull plate to the 90-degree position facing the tooling base. Remove the workpiece to be processed from the second hydraulic vertical positioning tooling station. Remove the pull rod from the workpiece to be processed, thus completing one processing cycle.

[0054] The machining process of this embodiment, a multi-station composite machining hydraulic tooling, increases the number of parts to be processed in a single clamping from 1 to 4 after tooling and process reform and optimization, as shown in the attached figure. Figure 4 As shown, a type of intermediate body used for connecting pump bodies is being machined. The existing process for machining this type of workpiece requires the following five steps:

[0055] (1) Disc milling machine: rough milling of two sides;

[0056] (2) Drilling machine: Drilling and tapping process;

[0057] (3) Disc grinder: grinding two sides;

[0058] (4) CNC lathe: machining coaxial holes;

[0059] (5) CNC milling machine: five processes including milling grooves.

[0060] Using the process described in this embodiment, the original five processes are integrated into one process. The machining center process flow is as follows: Edit the machining program according to the process and machining requirements, and prepare the cutting tools for machining:

[0061] (1) First, use an 80mm diameter end mill to process the workpieces on the first hydraulic horizontal positioning fixture and the second hydraulic vertical positioning fixture in sequence. This can replace the rough milling of the two sides of the disc milling machine.

[0062] (2) The machining center automatically changes tools and calls up the appropriate drill bit and tap according to the drawing requirements to process the workpieces on the first hydraulic horizontal positioning fixture station and the second hydraulic vertical positioning fixture station in sequence, which can replace the drilling and tapping process of the drilling machine.

[0063] (3) The machining center automatically changes tools and calls a 150mm diameter fly cutter with CBN inserts to mill the workpiece end face on the first hydraulic horizontal positioning fixture station and the second hydraulic vertical positioning fixture station in sequence. The milling end face replaces the grinding end face, which can replace the grinding of two sides of the disc grinder.

[0064] (4) The machining center automatically changes tools and calls the appropriate roughing tool and fine boring tool according to the drawing requirements to process the workpieces on the first hydraulic horizontal positioning fixture station and the second hydraulic vertical positioning fixture station in sequence, which can replace the CNC lathe to complete the coaxial hole turning process.

[0065] (5) The machining center automatically changes tools and calls the appropriate alloy keyway milling cutter according to the drawing requirements to process the milling process of the workpiece on the first hydraulic horizontal positioning fixture station and the second hydraulic vertical positioning fixture station in sequence, which can replace the CNC milling machine's slotting process.

[0066] (6) The machining center automatically changes tools, calls deburring tools and 100mm diameter nylon cup brushes, and removes burrs from the workpieces on the first hydraulic horizontal positioning fixture station and the second hydraulic vertical positioning fixture station in sequence, thus completing the entire machining process and completing the machining from blank to finished product.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-station composite processing hydraulic tooling, comprising a tooling base, wherein the tooling base is respectively provided with a first hydraulic horizontal positioning tooling station and a second hydraulic vertical positioning tooling station, the first hydraulic horizontal positioning tooling station is used for horizontal positioning processing of a workpiece to be processed, and the second hydraulic vertical positioning tooling station is used for vertical positioning and reprocessing of the workpiece to be processed after processing on the first hydraulic horizontal positioning tooling station; the first hydraulic horizontal positioning tooling station is at least 2 sets of tooling, and the second hydraulic vertical positioning tooling station is at least 2 sets of tooling; the first hydraulic horizontal positioning tooling station comprises a first hydraulic oil cylinder fixed on the tooling base, the first axis of the first hydraulic oil cylinder is connected to a movable jaw base sliding on a slide rail in front, the movable jaw base is provided with a jaw, a fixed seat is provided on the tooling base opposite to the jaw, and the tooling base between the fixed seat and the first hydraulic oil cylinder The seat is also provided with a workpiece positioning pile and a workpiece support shaft; the second hydraulic vertical positioning tooling includes a second hydraulic cylinder fixed to the bottom of the tooling base by a cylinder fixing bolt, the second axis core of the second hydraulic cylinder is connected to the rotating pulling plate by a cylinder center bolt, and a locking hole and a diagonal arc groove are provided on the rotating pulling plate, and a pump body pull rod is provided on the workpiece to be processed, and the pump body pull rod is inserted into the locking hole after passing downward through the tooling base, and the pump body pull rod is locked in the locking hole through the rotation of the rotating pulling plate; a connecting thread is provided at the upper end of the pump body pull rod for screwing into the mounting screw hole of the workpiece to be processed, and a narrowed locking portion is provided at the lower end of the pump body pull rod, and the locking hole is a strip hole, one side of the strip hole has a larger aperture and the other side has a smaller aperture, the large aperture is used for inserting the pump body pull rod, and the small aperture is used for locking the pump body pull rod in the locking hole after the rotating pulling plate rotates.

2. The multi-station composite processing hydraulic tooling according to claim 1 is characterized in that: A positioning plate is arranged above the tooling base.

3. The multi-station composite processing hydraulic tooling according to claim 1 is characterized in that: The rotating pull plate is provided with a manual lever.

4. The multi-station composite processing hydraulic tooling according to claim 1, characterized in that: There are two pump body pull rods, which are respectively installed at the bottom diagonals of the workpiece to be processed.

5. A processing technology based on the multi-station composite processing hydraulic tooling according to any one of claims 1 to 4, comprising the following steps: A. Installation of the first hydraulic horizontal positioning tooling station: Push the first manual valve to control the direction of the oil circuit to control the first axis of the first hydraulic cylinder to be in a retracted state, install the workpiece to be processed on the workpiece support shaft, close to the fixed seat and the workpiece positioning pile, pull back the first manual valve to control the first axis of the first hydraulic cylinder to extend, and clamp the workpiece to be processed; Installation of the second hydraulic vertical positioning tooling station: First, install the two tie rods on the diagonal threaded holes of the workpiece to be processed, push the second manual control valve to confirm that the second axis of the second hydraulic cylinder is in the extended state, and move the manual lever of the rotating pull plate to the 90-degree position facing the tooling base. Then, install the workpiece to be processed on the positioning plate, position it through the process pin hole, and move the manual lever of the rotating pull plate to the left to the limit position. The lower end of the tie rod is clamped on the diagonal arc groove of the rotating pull plate, and the second manual control valve is pushed to make the second axis of the second hydraulic cylinder in the retracted state. The rotating pull plate is subjected to force linkage and slides downward along the cylinder fixing sleeve to tighten the tie rod and the workpiece to be processed. B. Start the vertical machining center, call the machining tool, and process the product according to the process on the first hydraulic horizontal positioning tooling station and the second hydraulic vertical positioning tooling station in turn; C. After the processing is completed, push the first manual valve to control the first axis of the first hydraulic cylinder to be in a retracted state, remove the workpiece to be processed on the first hydraulic horizontal positioning tooling station, move it to the second hydraulic vertical positioning tooling station, and repeat the steps in step A for reprocessing; Push the second manual valve to extend the second axis of the second hydraulic cylinder, move the manual lever of the rotating pull plate to a 90-degree position facing the tooling base, remove the workpiece to be processed on the second hydraulic vertical positioning tooling station, remove the pull rod on the workpiece to be processed, and one processing is completed.

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