Drilling and milling tool and method for S-arm side plate of hydraulic loader

Abstract

The invention provides a hydraulic loader S arm side plate drilling and milling tool and method.The tool comprises a drilling and milling base and a pressing mechanism, and the drilling and milling base is provided with a first tool containing and chip removing hole, a second tool containing and chip removing hole and a third tool containing and chip removing hole; the first cutter containing and chip removing hole and the third cutter containing and chip removing hole correspond to shaft holes in the two ends of an S-arm side plate in position respectively, the second cutter containing and chip removing hole corresponds to a shaft hole in the middle of the S-arm side plate in position, and mounting holes used for fixing a drilling and milling base are formed in the bottom of the first cutter containing and chip removing hole and the bottom of the third cutter containing and chip removing hole respectively. The drilling and milling base is provided with two mounting holes, the two mounting holes are coaxial and communicated with the first cutter containing and chip removing hole and the third cutter containing and chip removing hole respectively, the first cutter containing and chip removing hole, the second cutter containing and chip removing hole and the third cutter containing and chip removing hole are all through holes, and the two pressing mechanisms are located on the two sides of the drilling and milling base respectively. According to the S-arm side plate machining fixture, clamping and fixing during S-arm side plate blank machining can be achieved. The pressing mode is simple and stable, and the clamping stability and efficiency are high.

Description

Technical Field

[0001] The invention relates to the technical field of drilling and milling tooling, and in particular to a hydraulic loader S-arm side plate drilling and milling tooling and a method. Background Art

[0002] A loader is a kind of engineering machinery. The working device of a loader is mainly composed of a bucket, an H arm and an S arm. The function of the working device is mainly to shovel and load loose materials such as soil, sand, lime, coal, etc. It can also do light shoveling and digging of ore, hard soil, etc. By replacing different auxiliary working devices, it can also perform bulldozing, lifting and other material loading and unloading operations.

[0003] Among them, the S-arm is a welded part composed of two S-arm side plates and an S-arm rotating sleeve. As one of the welding components, the S-arm side plate needs to be milled for the contour curve of the S-arm side plate and drilled for the three axial holes on the S-arm side plate before welding, and there are certain technical requirements for the diameter, shape tolerance, and position tolerance of the three axial holes. Before processing, the S-arm side plate needs to be clamped on the processing equipment. The operation of traditional tooling and fixtures is relatively complicated. For example, multiple bolts, nuts and other fixings are used for clamping. The clamping and disassembly process will be more complicated, which will increase the working time and reduce the production efficiency; or the clamping force is insufficient, and it is difficult to ensure the stability of the position of the S-arm side plate during processing, thereby affecting the processing accuracy. Therefore, in order to ensure the technical requirements and drilling and milling efficiency of the S-arm side plate, a hydraulic loader S-arm side plate drilling and milling tooling and method is needed. Summary of the invention

[0004] In order to solve the problems in the background technology, the present invention proposes a hydraulic loader S-arm side plate drilling and milling tool, including a drilling and milling base and a clamping mechanism, the drilling and milling base is provided with a first tool-cutter hole, a second tool-cutter hole and a third tool-cutter hole, the first tool-cutter hole and the third tool-cutter hole respectively correspond to the positions of the shaft holes at both ends of the S-arm side plate, the second tool-cutter hole corresponds to the position of the middle shaft hole of the S-arm side plate, the bottoms of the first tool-cutter hole and the third tool-cutter hole are both provided with mounting holes for fixing the drilling and milling base, the two mounting holes are respectively coaxial with the first tool-cutter hole and the third tool-cutter hole and are connected, the first tool-cutter hole, the second tool-cutter hole and the third tool-cutter hole are all through holes, and there are two clamping mechanisms, which are respectively located on both sides of the drilling and milling base. Preferably, the two clamping mechanisms are respectively a first clamping mechanism and a second clamping mechanism, the first clamping mechanism comprises a first clamping cylinder, a first clamping rod support and a first clamping rod, the first clamping rod support is located between the first clamping cylinder and the drilling base, the first clamping rod is hinged to the output end of the first clamping cylinder, the rod body of the first clamping rod is hinged to the first clamping rod support, the other end of the first clamping rod is located above the drilling and milling base, the second clamping mechanism comprises a second clamping cylinder, a second clamping rod support and a second clamping rod, and the second clamping mechanism has the same structure as the first clamping mechanism.

[0005] Preferably, each clamping mechanism has two pressure rod supports and two pressure rods, the two pressure rod supports are spaced apart, the pressure cylinder is located between the two pressure rod supports, a connecting rod is hinged at the output end of the pressure cylinder, both ends of the connecting rod are respectively hinged to one end of the two pressure rods away from the drilling and milling base, and each pressure rod support is correspondingly hinged to a pressure rod; The two first pressing rods are respectively located on a side of the first tool-cutting hole away from the second tool-cutting hole, between the second tool-cutting hole and the third tool-cutting hole, and the two second pressing rods are respectively located on a side of the third tool-cutting hole away from the second tool-cutting hole, between the second tool-cutting hole and the first tool-cutting hole.

[0006] Preferably, a pressing plate is provided at one end of the pressing rod close to the drilling and milling base, and the pressing plate is parallel to the drilling and milling base.

[0007] Preferably, a positioning mechanism is provided on one side of the drilling and milling base, and the positioning mechanism comprises a positioning cylinder and a positioning block, and the positioning block is connected to the output end of the positioning cylinder.

[0008] Preferably, the clamping mechanism is controlled by a first hydraulic system, which includes an oil tank, a three-position four-way reversing valve 1, a three-position four-way reversing valve 2 and an oil pump 1, wherein the input end of the oil pump 1 is connected to the oil tank through an oil filter 1, the output end of the oil pump 1 is connected to the P port of the three-position four-way reversing valve 1, the A port of the three-position four-way reversing valve 1 is connected to the first oil port of the first clamping oil cylinder through a one-way throttle valve 1, the B port of the three-position four-way reversing valve 1 is connected to the second oil port of the first clamping oil cylinder through a one-way throttle valve 2, and the three-position four-way reversing valve The T port of the three-position four-way reversing valve is connected with the T port of the three-position four-way reversing valve two, the A port of the three-position four-way reversing valve two is connected with the first oil port of the second clamping cylinder through the one-way throttle valve three, the B port of the three-position four-way reversing valve two is connected with the second oil port of the second clamping cylinder through the one-way throttle valve four, the pipeline between the output end of the oil pump one and the P port of the three-position four-way reversing valve one is respectively connected with the P port of the three-position four-way reversing valve two and the first pipeline, a pressure gauge one is provided on the first pipeline, and the first pipeline is connected with the return oil port of the oil tank through the overflow valve one and the temperature regulator one in sequence.

[0009] Preferably, the positioning mechanism is controlled by a second hydraulic system, which includes a three-position four-way reversing valve three and an oil pump two, the input end of the oil pump two is connected to the oil tank through an oil filter two, the output end of the oil pump two is connected to the P port of the three-position four-way reversing valve three, the A port of the three-position four-way reversing valve three is connected to the first oil port of the positioning cylinder through a one-way throttle valve five, the B port of the three-position four-way reversing valve three is connected to the second oil port of the positioning cylinder through a one-way throttle valve six, the T port of the three-position four-way reversing valve three is respectively connected to the pipeline between the output end of the oil pump two and the P port of the three-position four-way reversing valve three, and the second pipeline, a pressure gauge two is provided on the second pipeline, and the second pipeline is connected to the oil return port of the oil tank through an overflow valve two and a temperature regulator two in sequence.

[0010] A method for drilling and milling an S-arm side plate of a hydraulic loader comprises the following steps: S1. Use bolts and nuts to fix the S-arm side plate drilling and milling base on the CNC machining center workbench through two through holes; S2. Install the two sets of clamping mechanisms on the workbench of the CNC machining center respectively; S3, start the positioning cylinder, and the positioning cylinder drives the positioning block to move to the set positioning position; S4. Place the S-arm side plate blank on the drilling and milling base, and make the S-arm side plate blank close to the positioning block; S5, start the first clamping oil cylinder in the first clamping mechanism, the output end of the first clamping oil cylinder extends, driving one end of the first clamping pressure rod to rise, and the other end of the first clamping pressure rod to descend, so as to press the S-arm side plate blank onto the drilling and milling base; S6, start the CNC machining center processing program to perform drilling processing of three shaft holes of the S-arm side plate and milling processing of the contour curve on the left side of the S-arm side plate; S7, after the processing is completed, the second clamping oil cylinder in the second clamping mechanism is started, the S-arm side plate blank is pressed on the drilling and milling base through the second clamping mechanism, the first clamping oil cylinder in the first clamping mechanism is closed to reset the first clamping oil cylinder, and the positioning oil cylinder is closed to reset the positioning block; S8, start the CNC machining center processing program to perform contour curve milling processing on the right side of the S-arm side plate; S9. After the processing is completed, close the second clamping cylinder in the second clamping mechanism to reset the second clamping cylinder, and remove the processed S-arm side plate.

[0011] The present invention has the following beneficial effects: The drilling and milling base in the present invention is provided with through holes, which can be used to accommodate bolts and nuts, so that the drilling and milling base can be fixed on the workbench of the CNC machining center through the cooperation of bolts and nuts, and the S-arm side plate blank can be fixed on the drilling and milling base through a clamping mechanism. The clamping mechanism uses a cylinder to drive a pressure rod to perform a clamping action. The clamping method is simple and stable, and does not require a complicated operation process. It can ensure the stability and efficiency of clamping, and then ensure the accuracy and efficiency of processing. In addition, the present invention is provided with two sets of clamping mechanisms, which are respectively located on both sides of the drilling and milling base to perform clamping actions independently, which can ensure the clamping of the S-arm side plate blank while avoiding the clamping mechanism from hindering the milling of the contour curve on the side of the blank. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the S-arm side panel drilling and milling tooling of the present invention; Figure 2 It is a side view of the S-arm side plate drilling and milling tooling of the present invention; Figure 3 A top view of the S-arm side panel drilling and milling tooling of the present invention; Figure 4 This is a schematic diagram of the internal structure of the drilling and milling base of the present invention; Figure 5 It is a schematic diagram of a first hydraulic system of the present invention; Figure 6 This is a schematic diagram of a second hydraulic system of the present invention.

[0013] Numbers in the figure: 1, drilling and milling base; 2, first clamping oil cylinder; 3, first pressure rod support; 4, first clamping pressure rod; 5, connecting rod; 6, second clamping oil cylinder; 7, second pressure rod support; 8, second clamping pressure rod; 9, S-arm side plate blank; 10, first cutter row cutting hole; 11, second cutter row cutting hole; 12, third cutter row cutting hole; 13, mounting hole; 14, oil tank; 15, oil filter 1; 16, three-position four-way reversing valve 1; 17, one-way throttle valve 1; 18, one-way throttle valve 1. 2. 3-position four-way reversing valve; 2. 2. 3-position four-way reversing valve; 2. 3-position one-way throttle valve; 2. 4-position one-way throttle valve; 2. 4-position one-way throttle valve; 2. 5-position one-way throttle valve; 2. 6-position one-way throttle valve; 2. 6-position one-way throttle valve; 2. 7-position one-way throttle valve; 2. 8-position one-way throttle valve; 2. 2-position one-way throttle valve; 3. 4 ... DETAILED DESCRIPTION

[0014] In order to make the present invention clearer and more understandable, the technical solution of the present invention is further described in detail below in combination with the accompanying drawings and embodiments. It should be understood that the given embodiment is only one of the implementation methods and does not represent all embodiments.

[0015] In this article, the terms "up, down, left, right" and the like are established based on the positional relationships shown in the drawings. Depending on the different drawings, the corresponding positional relationships may also change accordingly. Therefore, they cannot be understood as absolute limitations on the scope of protection.

[0016] Combined with Figure 1 -Attached Figure 6 A hydraulic loader S-arm side plate drilling and milling tool, comprising a drilling and milling base 1 and a clamping mechanism, the drilling and milling base 1 is provided with a first tool row cutting hole 10, a second tool row cutting hole 11 and a third tool row cutting hole 12, the first tool row cutting hole 10 and the third tool row cutting hole 12 respectively correspond to the positions of the shaft holes at both ends of the S-arm side plate, the second tool row cutting hole 11 corresponds to the position of the middle shaft hole of the S-arm side plate, the first tool row cutting hole 10 and the third tool row cutting hole 12 are both provided with mounting holes 13 for fixing the drilling and milling base 1 at the bottom, the two mounting holes 13 are respectively coaxial with the first tool row cutting hole 10 and the third tool row cutting hole 12 and are connected, the first tool row cutting hole 10, the second tool row cutting hole 11 and the third tool row cutting hole 12 are all through holes, and there are two clamping mechanisms, which are respectively located on both sides of the drilling and milling base 1. The two clamping mechanisms are respectively a first clamping mechanism and a second clamping mechanism. The first clamping mechanism includes a first clamping cylinder 2, a first pressure rod support 3 and a first clamping rod 4. The first pressure rod support 3 is located between the first clamping cylinder 2 and the drilling base. The first clamping rod 4 is hinged to the output end of the first clamping cylinder 2. The rod body of the first clamping rod 4 is hinged to the first pressure rod support 3. The other end of the first clamping rod 4 is located above the drilling and milling base 1. The second clamping mechanism includes a second clamping cylinder 6, a second pressure rod support 7 and a second clamping rod 8. The second clamping mechanism has the same structure as the first clamping mechanism, that is, the second pressure rod support 7 is located between the second clamping cylinder 6 and the drilling base. The second clamping rod 8 is hinged to the output end of the second clamping cylinder 6. The rod body of the second clamping rod 8 is hinged to the second pressure rod support 7. The other end of the second clamping rod 8 is located above the drilling and milling base 1.

[0017] A positioning mechanism is provided on one side of the drilling and milling base. The positioning mechanism includes a positioning cylinder 31 and a positioning block 32 . The positioning block 32 is connected to the output end of the positioning cylinder 31 .

[0018] Specifically, each clamping mechanism has two pressure rod supports and two pressure rods, the two pressure rod supports are spaced apart, the pressure cylinder is located between the two pressure rod supports, a connecting rod 5 is hinged at the output end of the pressure cylinder, and both ends of the connecting rod 5 are respectively hinged to one end of the two pressure rods away from the drilling and milling base 1, and each pressure rod support is correspondingly hinged to a pressure rod; The two first pressing rods 4 are respectively located on the side of the first tool-cutting hole 10 away from the second tool-cutting hole 11 and between the second tool-cutting hole 11 and the third tool-cutting hole 12. The two second pressing rods 8 are respectively located on the side of the third tool-cutting hole 12 away from the second tool-cutting hole 11 and between the second tool-cutting hole 11 and the first tool-cutting hole 10.

[0019] Specifically, a pressing plate 36 is provided at one end of the pressing rod close to the drilling and milling base 1, and the pressing plate 36 is parallel to the drilling and milling base 1. The pressing plate 36 can increase the contact area between the pressing rod and the S-arm side plate, thereby improving the pressing effect.

[0020] Specifically, a positioning mechanism is provided on one side of the drilling and milling base. The positioning mechanism includes a positioning cylinder 31 and a positioning block 32 . The positioning block 32 is connected to the output end of the positioning cylinder 31 .

[0021] Specifically, the clamping mechanism is controlled by a first hydraulic system, which includes an oil tank 14, a three-position four-way reversing valve 16, a three-position four-way reversing valve 2 19 and an oil pump 33. The input end of the oil pump 33 is connected to the oil tank 14 through an oil filter 15, and the output end of the oil pump 33 is connected to the P port of the three-position four-way reversing valve 16. The A port of the three-position four-way reversing valve 16 is connected to the first oil port of the first clamping cylinder 2 through a one-way throttle valve 17, the B port of the three-position four-way reversing valve 16 is connected to the second oil port of the first clamping cylinder 2 through a one-way throttle valve 2 18, and the T port of the three-position four-way reversing valve 16 is connected to the The three-position four-way reversing valve 19 is connected to the T port to ensure that the first clamping cylinder 2 and the second clamping cylinder 6 can act synchronously. The A port of the three-position four-way reversing valve 19 is connected to the first oil port of the second clamping cylinder 6 through the one-way throttle valve 3 20. The B port of the three-position four-way reversing valve 19 is connected to the second oil port of the second clamping cylinder 6 through the one-way throttle valve 4 21. The pipeline between the output end of the oil pump 1 33 and the P port of the three-position four-way reversing valve 16 is respectively connected to the P port of the three-position four-way reversing valve 19 and the first pipeline. A pressure gauge 1 22 is provided on the first pipeline, and the first pipeline is connected to the return oil port of the oil tank 14 through the overflow valve 1 23 and the temperature regulator 1 24 in turn.

[0022] The positioning mechanism is controlled by a second hydraulic system, which includes a three-position four-way reversing valve three 25 and an oil pump two 34. The input end of the oil pump two 34 is connected to the oil tank 14 through an oil filter two 35, and the output end of the oil pump two 34 is connected to the P port of the three-position four-way reversing valve three 25. The A port of the three-position four-way reversing valve three 25 is connected to the first oil port of the positioning cylinder 31 through a one-way throttle valve five 26, and the B port of the three-position four-way reversing valve three 25 is connected to the second oil port of the positioning cylinder 31 through a one-way throttle valve six 27. The T port of the three-position four-way reversing valve three 25 is respectively connected to the pipeline between the output end of the oil pump two 34 and the P port of the three-position four-way reversing valve three 25 and the second pipeline. A pressure gauge two 28 is provided on the second pipeline, and the second pipeline is connected to the return oil port of the oil tank 14 through an overflow valve two 29 and a temperature regulator two 30 in sequence.

[0023] The one-way throttle valve is used to adjust the flow of hydraulic oil when it enters the oil cylinder, and can achieve the effect of one-way speed regulation to ensure the stability of the operation of the oil cylinder piston rod. The piston rod is the output end of the oil cylinder. Pressure gauge 1 22 and pressure gauge 2 28 respectively display the pressure in the first pipeline and the second pipeline in real time, so that the staff can check the pipeline pressure in real time. The oil filter is used to filter impurities in the hydraulic oil. The three-position four-way reversing valve realizes the selection of different oil circuits by controlling the closure of its four ports. The overflow valve can maintain the hydraulic system to operate within a certain pressure range to prevent the system pressure from exceeding the set value and damaging the hydraulic components and pipelines. When the system pressure exceeds the set value, the overflow valve will open and guide the excess hydraulic oil back to the oil tank 14, thereby protecting the system from the influence of excessive pressure. The temperature regulator can ensure that the hydraulic oil returned to the oil tank 14 meets the requirements and ensures that the hydraulic oil works within the appropriate temperature range, thereby ensuring the normal operation of the hydraulic system and extending the service life of the equipment.

[0024] The first oil port of the first clamping cylinder 2 is the oil inlet of the rodless chamber of the first clamping cylinder 2, the second oil port of the first clamping cylinder 2 is the oil inlet of the rod chamber of the first clamping cylinder 2, the first oil port of the second clamping cylinder 6 is the oil inlet of the rod chamber of the second clamping cylinder 6, the second oil port of the second clamping cylinder 6 is the oil inlet of the rodless chamber of the second clamping cylinder 6, the first oil port of the positioning cylinder 31 is the oil inlet of the rodless chamber of the positioning cylinder 31, and the second oil port of the positioning cylinder 31 is the oil inlet of the rod chamber of the positioning cylinder 31. When hydraulic oil enters the rod chamber of the cylinder, the hydraulic oil will push the piston to move toward the rodless chamber, and the hydraulic oil in the rodless chamber of the same cylinder will be squeezed out by the piston to achieve the contraction of the piston rod. Conversely, when hydraulic oil enters the rod chamber, the extension of the piston rod can be achieved. The extension and retraction of the cylinder piston rod is achieved by allowing hydraulic oil to enter and exit different chambers.

[0025] A method for drilling and milling an S-arm side plate of a hydraulic loader comprises the following steps: S1. Use bolts and nuts to fix the S-arm side plate drilling and milling base 1 on the workbench of the CNC machining center through two through holes; S2. Install the two sets of clamping mechanisms on the workbench of the CNC machining center respectively; S3, starting the positioning cylinder 31, and driving the positioning block 32 to move to a set positioning position; S4, placing the S-arm side plate blank 9 on the drilling and milling base 1, and making the S-arm side plate blank 9 close to the positioning block 32; S5, start the first clamping oil cylinder 2 in the first clamping mechanism, the output end of the first clamping oil cylinder 2 extends, driving one end of the first clamping pressure rod 4 to rise, and the other end of the first clamping pressure rod 4 to descend, so as to press the S-arm side plate blank 9 onto the drilling and milling base 1; S6, start the CNC machining center processing program to perform drilling processing of three shaft holes of the S-arm side plate and milling processing of the contour curve on the left side of the S-arm side plate; S7, after the processing is completed, the second clamping oil cylinder 6 in the second clamping mechanism is started, and the S-arm side plate blank 9 is pressed onto the drilling and milling base 1 through the second clamping mechanism, and the first clamping oil cylinder 2 in the first clamping mechanism is closed to reset the first clamping oil cylinder 2, and the positioning oil cylinder 31 is closed to reset the positioning block 32; S8, start the CNC machining center processing program to perform contour curve milling processing on the right side of the S-arm side plate; S9. After the processing is completed, close the second clamping cylinder 6 in the second clamping mechanism to reset the second clamping cylinder 6, and remove the processed S-arm side plate.

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

Claims

1. A hydraulic loader S-arm side plate drilling and milling tool, characterized in that: The invention comprises a drilling and milling base (1) and a clamping mechanism, wherein the drilling and milling base (1) is provided with a first tool-cutting hole (10), a second tool-cutting hole (11) and a third tool-cutting hole (12), wherein the first tool-cutting hole (10) and the third tool-cutting hole (12) respectively correspond to the positions of the shaft holes at both ends of the S-arm side plate, and the second tool-cutting hole (11) corresponds to the position of the middle shaft hole of the S-arm side plate. The bottoms of the first tool-cutting hole (10) and the third tool-cutting hole (12) are both provided with mounting holes (13) for fixing the drilling and milling base (1), and the two mounting holes (13) are respectively coaxial with and connected to the first tool-cutting hole (10) and the third tool-cutting hole (12), and the first tool-cutting hole (10), the second tool-cutting hole (11) and the third tool-cutting hole (12) are all through holes. There are two clamping mechanisms, which are respectively located on both sides of the drilling and milling base (1).

2. The hydraulic loader S-arm side plate drilling and milling tool according to claim 1, characterized in that: The two clamping mechanisms are respectively a first clamping mechanism and a second clamping mechanism. The first clamping mechanism comprises a first clamping cylinder (2), a first clamping rod support (3) and a first clamping rod (4). The first clamping rod support (3) is located between the first clamping cylinder (2) and the drilling base. The first clamping rod (4) is hinged to the output end of the first clamping cylinder (2). The rod body of the first clamping rod (4) is hinged to the first clamping rod support (3). The other end of the first clamping rod (4) is located above the drilling and milling base (1). The second clamping mechanism comprises a second clamping cylinder (6), a second clamping rod support (7) and a second clamping rod (8). The second clamping mechanism has the same structure as the first clamping mechanism.

3. The hydraulic loader S-arm side plate drilling and milling tool according to claim 2, characterized in that: There are two pressure rod supports and pressure rods in each clamping mechanism, the two pressure rod supports are arranged at intervals, the pressure cylinder is located between the two pressure rod supports, the output end of the pressure cylinder is hinged with a connecting rod (5), the two ends of the connecting rod (5) are respectively hinged to one end of the two pressure rods away from the drilling and milling base (1), and each pressure rod support is correspondingly hinged to a pressure rod; The two first pressing rods (4) are respectively located on a side of the first cutting hole (10) away from the second cutting hole (11), and between the second cutting hole (11) and the third cutting hole (12); and the two second pressing rods (8) are respectively located on a side of the third cutting hole (12) away from the second cutting hole (11), and between the second cutting hole (11) and the first cutting hole (10).

4. A hydraulic loader S-arm side plate drilling and milling tool as claimed in claim 2 or 3, characterized in that: A pressing plate (36) is provided at one end of the pressing rod close to the drilling and milling base (1), and the pressing plate (36) is parallel to the drilling and milling base (1).

5. The hydraulic loader S-arm side plate drilling and milling tool according to claim 4, characterized in that: A positioning mechanism is provided on one side of the drilling and milling base, the positioning mechanism comprising a positioning oil cylinder (31) and a positioning block (32), the positioning block (32) being connected to the output end of the positioning oil cylinder (31).

6. The hydraulic loader S-arm side plate drilling and milling tool according to claim 5, characterized in that: The clamping mechanism is controlled by a first hydraulic system, the first hydraulic system comprising an oil tank (14), a three-position four-way reversing valve (16), a three-position four-way reversing valve (19) and an oil pump (33). The input end of the oil pump (33) is connected to the oil tank (14) via an oil filter (15), the output end of the oil pump (33) is connected to the P port of the three-position four-way reversing valve (16), the A port of the three-position four-way reversing valve (16) is connected to the first oil port of the first clamping oil cylinder (2) via a one-way throttle valve (17), the B port of the three-position four-way reversing valve (16) is connected to the second oil port of the first clamping oil cylinder (2) via a one-way throttle valve (18), and the three-position four-way reversing valve (1) is connected to the second oil port of the first clamping oil cylinder (2). The T port of the three-position four-way reversing valve (16) is connected to the T port of the three-position four-way reversing valve (19), the A port of the three-position four-way reversing valve (19) is connected to the first oil port of the second clamping oil cylinder (6) through the one-way throttle valve (20), the B port of the three-position four-way reversing valve (19) is connected to the second oil port of the second clamping oil cylinder (6) through the one-way throttle valve (21), the pipeline between the output end of the oil pump (1) and the P port of the three-position four-way reversing valve (16) is respectively connected to the P port of the three-position four-way reversing valve (19) and the first pipeline, the first pipeline is provided with a pressure gauge (22), and the first pipeline is connected to the oil return port of the oil tank (14) through the overflow valve (23) and the temperature regulator (24) in sequence.

7. The hydraulic loader S-arm side plate drilling and milling tool according to claim 6, characterized in that: The positioning mechanism is controlled by a second hydraulic system, the second hydraulic system comprising a three-position four-way reversing valve three (25) and an oil pump two (34), the input end of the oil pump two (34) being connected to the oil tank (14) via an oil filter two (35), the output end of the oil pump two (34) being connected to the P port of the three-position four-way reversing valve three (25), the A port of the three-position four-way reversing valve three (25) being connected to the first oil port of the positioning cylinder (31) via a one-way throttle valve five (26), and the three The B port of the three-position four-way reversing valve (25) is connected to the second oil port of the positioning cylinder (31) through the one-way throttle valve (27), and the T port of the three-position four-way reversing valve (25) is connected to the pipeline between the output end of the second oil pump (34) and the P port of the three-position four-way reversing valve (25), and the second pipeline, respectively. The second pipeline is provided with a pressure gauge (28), and the second pipeline is connected to the oil return port of the oil tank (14) through the overflow valve (29) and the temperature regulator (30) in sequence.

8. A method for drilling and milling the S-arm side plate of a hydraulic loader, implemented by the drilling and milling tooling for the S-arm side plate of a hydraulic loader according to claim 7, characterized in that: The following steps are involved: S1. Use bolts and nuts to fix the S-arm side plate drilling and milling base (1) on the workbench of the CNC machining center through the two through holes; S2. Install the two sets of clamping mechanisms on the workbench of the CNC machining center respectively; S3, starting the positioning cylinder (31), and the positioning cylinder (31) drives the positioning block (32) to move to a set positioning position; S4, placing the S-arm side plate blank (9) on the drilling and milling base (1), and making the S-arm side plate blank (9) close to the positioning block (32); S5, starting the first clamping oil cylinder (2) in the first clamping mechanism, the output end of the first clamping oil cylinder (2) extends, driving one end of the first clamping pressure rod (4) to rise, and the other end of the first clamping pressure rod (4) to descend, so as to clamp the S-arm side plate blank (9) onto the drilling and milling base (1); S6, start the CNC machining center processing program to perform drilling processing of three shaft holes of the S-arm side plate and milling processing of the contour curve on the left side of the S-arm side plate; S7, after the processing is completed, the second clamping oil cylinder (6) in the second clamping mechanism is started, and the S-arm side plate blank (9) is pressed onto the drilling and milling base (1) by the second clamping mechanism, the first clamping oil cylinder (2) in the first clamping mechanism is closed to reset the first clamping oil cylinder (2), and the positioning oil cylinder (31) is closed to reset the positioning block (32); S8, start the CNC machining center processing program to perform contour curve milling processing on the right side of the S-arm side plate; S9. After the processing is completed, the second clamping oil cylinder (6) in the second clamping mechanism is closed to reset the second clamping oil cylinder (6), and the processed S-arm side plate is removed.

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