Multi-station positioning and clamping auxiliary device for valve plate machining center

Abstract

The invention relates to the technical field of plunger pump machining, and particularly discloses a valve plate machining center multi-station positioning and clamping auxiliary device which comprises a bottom plate and a plurality of mounting seats, the mounting seats are detachably connected with the bottom plate, each mounting seat comprises a center positioning column and an auxiliary positioning pin, the center positioning columns are coaxial with the mounting seats, and the auxiliary positioning pins are arranged on the mounting seats. The mounting base is provided with two kidney-shaped grooves, the two kidney-shaped grooves are symmetrically arranged along a straight line formed by connecting the center column and the auxiliary positioning pin, and a valve plate to be machined is detachably fixed to the mounting base. The invention aims to solve the problems that the existing valve plate adopts a single clamping mode, so that the efficiency is low, and the valve plate is not suitable for clamping a large batch of valve plates.

Description

Technical Field

[0001] The invention relates to the technical field of plunger pump processing, in particular to a multi-tasking positioning and clamping auxiliary device for a valve plate processing center. Background Art

[0002] The plunger pump is an important device in the hydraulic system. The plunger reciprocates in the cylinder to change the volume of the sealed working chamber to achieve oil suction and oil pressure. As an important part of the axial piston pump, the valve plate plays a vital role in the plunger pump. The main functions of the valve plate include balancing pressure, reducing pulsation, improving efficiency, reducing vibration and noise, and improving pump reliability.

[0003] In the production process of the distribution plate, the distribution window and the triangular groove are key parts, and these parts are usually processed by CNC milling machines. In order to ensure processing accuracy and stability, special clamping tools are required to fix the distribution plate. However, the existing clamping tool design can only clamp one distribution plate at a time, which means that when faced with a large number of distribution plates to be processed, the operator must frequently repeat the loading and unloading process. This repeated clamping operation not only increases the labor intensity, but also significantly reduces the overall processing efficiency. Because each distribution plate needs to be processed individually, batch continuous production cannot be achieved, which seriously affects the needs of large-scale production. Summary of the invention

[0004] In view of the deficiencies in the prior art, the technical problem solved by the present invention is to provide a multi-station positioning and clamping auxiliary device for a distribution plate processing center, so as to solve the problem that the existing distribution plate adopts a single clamping method with low efficiency and is not suitable for large-scale distribution plate clamping.

[0005] In order to solve the above problems, the technical solution adopted by the present invention is: a multi-station positioning and clamping auxiliary device for a distribution disk processing center, including a base plate and a mounting seat, the mounting seat is detachably connected to the base plate and is provided with multiple, the mounting seat includes a center positioning column and an auxiliary positioning pin, the center positioning column is coaxial with the mounting seat, the mounting seat is provided with two waist-shaped grooves, the two waist-shaped grooves are symmetrically arranged along the straight line formed by the center column and the auxiliary positioning pin, and the distribution disk to be processed can be detachably fixed on the mounting seat.

[0006] The beneficial effects of this solution are: the base plate is fixed on the CNC milling machine, the movement of the manipulator is controlled by the built-in program, and the distribution disc fixed on the mounting seat is milled to produce the distribution window and triangular groove according to the settings. After the processing is completed, the manipulator moves to the next mounting seat to process the next distribution window; thus, all processing tasks of multiple distribution discs can be completed with only one clamping, which greatly reduces the time waste caused by frequent replacement of workpieces and the possible introduction of human errors. At the same time, it also significantly improves production efficiency, making it possible to produce high-quality distribution discs on a large scale and efficiently, and is suitable for mass production needs.

[0007] Furthermore, the valve plate to be processed is pressed on the mounting seat by a detachably connected pressing block, and the pressure block is connected with bolts to simplify the structure and facilitate the assembly and disassembly of the valve plate.

[0008] Furthermore, a protrusion is provided at the lower end of the mounting seat, and a groove that matches the size of the protrusion and can be embedded in the base is provided. The cooperation between the protrusion and the groove facilitates quick positioning.

[0009] Furthermore, there are 2 to 10 mounting seats.

[0010] Furthermore, it also includes an auxiliary positioning moving device for moving and fixing the bottom plate, the auxiliary positioning moving device includes a workbench, a moving positioning mechanism arranged on the workbench and a negative pressure box arranged under the workbench, and a fan and a dust bag are arranged in the negative pressure box; the workbench is provided with an air suction port connected to the negative pressure box in the transverse direction, and the air suction port is located below the machine tool manipulator; the bottom plate is provided with a plurality of first air holes, and the mounting seat is provided with a second air hole that fits the position of the first air hole; the waist-shaped groove is a through groove, and a plurality of slag suction holes are opened on the bottom plate located at the waist-shaped groove;

[0011] The movable positioning mechanism includes a transverse push plate and a longitudinal push plate, two transverse push plates are symmetrically arranged along the longitudinal center line of the workbench, a cover plate that can cover the air intake port is detachably fixed at the lower end of the transverse push plate, and the cover plate is slidably connected to the table top of the workbench; the transverse push plate is provided with a first limit groove, the first limit groove is provided with a limit column, a spring is connected between the limit column and the bottom of the limit groove, and the two longitudinal side walls of the base plate are provided with a first positioning groove for the limit column to be embedded; the longitudinal push plate is slidably connected to the guide block of the base through a slider, the guide block is provided with a second limit groove, and the slider is provided with a second positioning groove, the angle between the first positioning groove, the second positioning groove and the center of the mounting seat is a right angle, and the intersection point of the straight lines of the first limit groove and the second limit groove is the machining center point of the manipulator.

[0012] Since the manipulators of most affordable CNC milling machines have limited moving distances, and CNC machine tools that can achieve long-distance movement are expensive, when the manipulators of CNC milling machines can only move within the processing range of a single distribution plate, the base plate is moved reciprocatingly horizontally and unidirectionally longitudinally through a mobile positioning mechanism. During the movement, the longitudinal movement is positioned by the first limit groove and the first positioning groove, and the lateral movement is positioned by the second limit groove and the second positioning groove, thereby achieving mobile positioning of the entire base plate.

[0013] By starting the fan to increase the flow rate in the box, negative pressure is generated. When the distribution disc to be processed is positioned by the central positioning column and the auxiliary positioning pin and placed on the mounting seat, the second air hole and the waist-shaped groove are covered. Under the action of the negative pressure in the negative pressure box, the distribution disc is adsorbed on the mounting seat through the first air hole and the second air hole. No additional pressure block is required to compact the distribution disc, thereby achieving rapid loading and unloading of multiple distribution discs. When the manipulator performs CNC milling on the distribution disc, waste chips are likely to remain at the bottom of the hole after drilling, thereby affecting the cleanliness and surface quality of the workpiece. In this solution, since the suction port is below the manipulator, the processing waste slag at the bottom of the drilled through hole can be sucked into the negative pressure box through the slag suction hole under the action of negative pressure, and then collected in the dust bag; thereby, the processing quality of the workpiece will not be affected.

[0014] Furthermore, the bottom of the negative pressure box includes a fixed plate, a movable plate and a connecting soft plate. The movable plate is located below the air inlet. The connecting soft plates are arranged on both sides of the movable plate to connect the movable plate and the fixed plate. A lifting rod is arranged at the lower end of the movable plate. The distance between the movable plate and the air inlet can be adjusted by the lifting rod. When the movable plate is closer to the air inlet, the entire negative pressure box forms a venturi tube. When the airflow passes through the narrow section at the movable plate, the airflow velocity is accelerated, further increasing the negative pressure at the movable plate, so that the distribution plate on the bottom plate and the mounting plate can be firmly adsorbed and fixed; and the negative pressure at the air inlet can be adjusted by adjusting the position of the movable plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the base plate and mounting base of Example 1;

[0016] Figure 2 It is a schematic diagram of the separation of the mounting base and the base plate;

[0017] Figure 3 It is a top view of Example 2;

[0018] Figure 4 It is a front cross-sectional view of Example 2;

[0019] Figure 5 This is a top view of the workbench without the base plate and mounting base;

[0020] Figure 6 Enlarged view of the base plate mount. DETAILED DESCRIPTION

[0021] The following is further described in detail through specific implementation methods:

[0022] The figure marks in the drawings of the specification include: base plate 1, groove 11, first air hole 12, first positioning groove 13, slag suction hole 14, mounting seat 2, pressure block 21, protrusion 22, center positioning column 23, auxiliary positioning pin 24, waist-shaped groove 25, second air hole 26, workbench 3, horizontal push plate 31, first limiting groove 311, cover plate 32, longitudinal push plate 33, guide block 34, second limiting groove 341, slider 35, second positioning groove 351, negative pressure box 4, fixed plate 41, movable plate 42, connecting soft plate 43, lifting rod 44, fan 45, suction port 46, distribution plate 5.

[0023] Embodiment 1 is basically as attached Figure 1 , Figure 2 As shown: a multi-station positioning and clamping auxiliary device for a distribution plate 5 machining center, including a base plate 1 and a mounting seat 2, the mounting seat 2 is bolted to the base plate 1 and is provided with multiple mounting seats 2, the mounting seat 2 includes a central positioning column 23 and an auxiliary positioning pin 24, the central positioning column 23 is coaxial with the mounting seat 2, the mounting seat 2 is provided with two waist-shaped grooves 25, the two waist-shaped grooves 25 are symmetrically arranged along the straight line formed by the central column and the auxiliary positioning pin 24, and the distribution plate 5 to be processed is pressed on the mounting seat 2 by a pressure block 21 connected by bolts. A protrusion 22 is provided at the lower end of the mounting seat 2, and a groove 11 that matches the size of the protrusion 22 and can be embedded in the base. In this embodiment, there are 8 mounting seats 2, arranged in 2 rows and 4 columns.

[0024] When in use, the base plate 1 is fixed on the CNC milling machine, and the movement trajectory and action of the manipulator are controlled by the built-in program. According to the pre-set parameters and paths, the manipulator can accurately perform milling processing on the distribution disc 5 installed in a specific position, including but not limited to accurately opening the distribution window and forming the required complex structures such as the triangular groove. Once all the designated parts of the current distribution disc 5 have been processed, the control system controls the manipulator to automatically move to the next mounting seat 2 to be processed, and repeats the above process until the last distribution disc 5 is also successfully processed. In this way, all processing tasks of multiple distribution discs 5 can be completed with only one clamping, which greatly reduces the time waste caused by frequent replacement of workpieces and the possible introduction of human errors. At the same time, it also significantly improves production efficiency, making it possible to produce high-quality distribution discs 5 on a large scale and efficiently, and is suitable for mass production needs.

[0025] Example 2 is basically the same Figure 3-6As shown, the difference from Example 1 is that it also includes an auxiliary positioning moving device for moving and fixing the base plate 1, the auxiliary positioning moving device includes a workbench 3, and a moving positioning mechanism arranged on the workbench 3 and a negative pressure box 4 arranged under the workbench 3, a fan 45 and a dust collecting bag are arranged in the negative pressure box 4, and the integrated bag is not shown in the figure; the workbench 3 is opened with an air intake port 46 connected to the negative pressure box 4 in the transverse direction, and the air intake port 46 is located below the machine tool manipulator; the base plate 1 is provided with a plurality of first air holes 12, and the mounting seat 2 is provided with a second air hole 26 which is in contact with the position of the first air hole 12; the waist-shaped groove 25 is a through groove, and a plurality of slag suction holes 14 are opened on the base plate 1 located at the waist-shaped groove 25; the bottom of the negative pressure box 4 includes a fixed plate 41, a movable plate 42 and a connecting soft plate 43, the movable plate 42 is located below the air intake port 46, the connecting soft plate 43 is arranged on both sides of the movable plate for connecting the movable plate 42 and the fixed plate 41, and a lifting rod 44 is provided at the lower end of the movable plate 42. The first pore 12 and the second pore 26 have the same aperture and are smaller than the slag suction hole 14 .

[0026] By starting the fan 45 to increase the flow rate in the box, negative pressure is generated. When the distribution plate 5 to be processed is positioned by the central positioning column 23 and the auxiliary positioning pin 24 and placed on the mounting seat 2, the second air hole 26 and the waist-shaped groove 25 are covered. Under the action of the negative pressure in the negative pressure box 4, the distribution plate 5 is adsorbed on the mounting seat 2 through the first air hole 12 and the second air hole 26. No additional pressing block 21 is required to press the distribution plate 5, so that multiple distribution plates 5 can be quickly loaded and unloaded; secondly, the distance between the movable plate 42 and the air inlet 46 can be adjusted by the lifting rod 44. When the movable plate 42 is close to the air inlet 46, the entire negative pressure box 4 forms a Venturi tube, so that when the airflow flows through the narrow part of the movable plate 42 During the period, the air flow velocity is accelerated, further increasing the negative pressure at the movable plate 42, so that the distribution plate 5 on the base plate 1 and the mounting plate can be firmly adsorbed and fixed; and then the negative pressure at the air intake port 46 can be adjusted by adjusting the position of the movable plate 42; when the manipulator performs CNC milling on the distribution plate 5, waste chips are likely to remain at the bottom of the hole after drilling, and small particles of waste chips are likely to adhere to the surface of the workpiece, thereby affecting the cleanliness and surface quality of the workpiece. In this solution, since the air intake port is below the manipulator, the processing waste residue at the bottom of the drilled through hole can be sucked into the negative pressure box 4 through the residue suction hole 14 under the action of negative pressure, and then collected in the dust bag; thereby, it will not affect the processing quality of the workpiece, and the residue suction hole 14 can be set to a larger aperture as needed.

[0027] The mobile positioning mechanism includes a transverse push plate 31 and a longitudinal push plate 33. Two transverse push plates 31 are symmetrically arranged along the longitudinal center line of the workbench 3. A cover plate 32 that can cover the air intake port 46 is detachably fixed at the lower end of the transverse push plate 31, and the cover plate 32 is slidably connected to the workbench 3 surface; the transverse push plate 31 is provided with a first limiting groove 311, and the first limiting groove 311 is provided with a limiting column, and a spring is connected between the limiting column and the bottom of the limiting groove, and the two longitudinal side walls of the bottom plate 1 are provided with a first positioning groove 13 for the limiting column to be embedded; the longitudinal push plate 33 is slidably connected to the guide block 34 of the base through a slider 35, and the guide block 34 is provided with a second limiting groove 341, and the slider 35 is provided with a second positioning groove 351, and the angle between the first positioning groove 13, the second positioning groove 351 and the center of the mounting seat 2 is a right angle, and the intersection point of the straight lines of the first limiting groove 311 and the second limiting groove 341 is the machining center point of the manipulator. Since eight mounting seats 2 are arranged in two rows and four columns in this embodiment, four first positioning grooves 13 are distributed longitudinally, and two second positioning grooves 351 are distributed transversely. The driving mechanisms of the transverse push plate 31 and the longitudinal push plate 33 are both telescopic cylinders or hydraulic cylinders.

[0028] Since the manipulators of most affordable CNC milling machines have limited moving distances, and CNC machine tools that can achieve long-distance movement are expensive, when the manipulators of the CNC milling machines can only move within the processing range of a single distribution plate 5, the base plate 1 is moved reciprocatingly in the horizontal direction and unidirectionally in the longitudinal direction through the mobile positioning mechanism. During the movement, the longitudinal movement is positioned by the first limit groove 311 and the first positioning groove 13, and the lateral movement is positioned by the second limit groove 341 and the second positioning groove 351, thereby realizing the movement and positioning of the entire base plate 1.

[0029] A part identification reference point is provided on the mounting seat 2, which is not shown in the figure, and the part identification reference is not blocked by the part after the part is installed; the CNC milling machine tool is provided with a camera for taking pictures of the mounting seat and parts of the current processing station to collect images, and the CNC milling machine tool is also provided with an image recognition module, which is used to identify the identification reference point of the collected image, and the path planning module of the CNC milling machine tool uses the identification reference point as a reference point to pre-set number parameters and paths.

[0030] By setting an identification reference point for each mounting seat 2, and cooperating with the camera and image recognition module, further precise positioning of the parts to be processed can be achieved, thereby improving the accuracy of part processing and avoiding errors in the initial positioning of the entire auxiliary device. After multiple movements to process parts on different mounting seats, the errors accumulate too much, causing the subsequent processed parts to have low accuracy and fail to meet the processing requirements and be scrapped. By setting an identification reference point and cooperating with image recognition technology, each processed part can be individually re-positioned, so that the error is inconvenient and within the control range, thereby ensuring the processing accuracy of the parts.

[0031] by Figure 3 Taking the first distribution plate 5 in the lower left as the starting processing point as an example, when in use, the distribution plate 5 and the mounting seat 2 are placed on the base plate 1, the limiting column of the first limiting groove 311 is embedded in the first positioning groove 13 on the leftmost side of the base plate 1, and the limiting column of the second limiting groove 341 is embedded in the second positioning groove 351 at the bottom. Since the intersection point of the straight lines of the first limiting groove 311 and the second limiting groove 341 is the machining center point of the manipulator, and the first positioning groove 13 on the leftmost side and the bottommost side are located at the bottom of the base plate 1, the limiting column of the second limiting groove 341 is embedded in the second positioning groove 351 at the bottom. The second positioning groove 351 is colinear with the center of the first distribution plate 5 on the lower left in the horizontal and vertical directions, respectively, so that the distribution plate 5 is located at the processing center point; then the fan 45 is started, and the lifting rod 44 lifts the movable plate 42, so that negative pressure is generated in the negative pressure box 4; because the distribution plate 5 covers the first air hole 12 and the second air hole 26, the distribution plate 5 above the air intake port 46 is firmly adsorbed on the mounting seat 2, and at the same time, the base plate 1 is fixed on the workbench 3 under the action of negative pressure. After the current distribution plate 5 is processed, the next distribution plate 5 can be moved to the processing center by lateral movement or longitudinal movement. This time, the lateral movement method is adopted. First, the movable plate 42 is lowered to a height lower than the fixed plate 41. At this time, the space between the movable plate 42 and the air suction port becomes larger, and the negative pressure is reduced, so that the bottom plate 1 is no longer tightly adsorbed, which facilitates the movement of the bottom plate 1; the lateral push plate 31 is started, and the movement of the lateral push plate 31 drives the cover plate 32 to move at the same time, so that the air suction port without the bottom plate 1 can be covered, and the upper lateral push plate 31 is pushed downward, and the lower lateral push plate 31 cooperates with the upper lateral push plate 31 to retract downward, and at the same time, the upper lateral push plate 31 pushes the longitudinal push plate 33 to move downward, and the slider 35 It moves along until the slider 35 slides to the second limit groove 341, and the limit rod is embedded in the second positioning groove 351 at the top, so as to realize the positioning of the lateral movement; at this time, the first distribution disk 5 on the upper left is located at the processing center point, and the lifting rod 44 drives the movable plate 42 to move upward, so that the negative pressure between the movable plate 42 and the air suction port is increased; when the processing of this distribution disk 5 is completed, the position of the movable plate 42 is lowered again, and the bottom plate 1 is moved to the left through the longitudinal push plate 33 until the limit column in the first positioning groove 13 is embedded in the second first positioning groove 13 on the left, and at this time, the second distribution disk 5 on the upper left is located at the processing center point; and so on, the processing of all the distribution disks 5 on the bottom plate 1 is completed along the serpentine route.

[0032] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A multi-station positioning and clamping auxiliary device for a valve plate machining center, characterized in that: It includes a base plate and a mounting seat, which is detachably connected to the base plate and is provided with multiple mounting seats, the mounting seat includes a center positioning column and an auxiliary positioning pin, the center positioning column is coaxial with the mounting seat, the mounting seat is provided with two waist-shaped grooves, the two waist-shaped grooves are symmetrically arranged along the straight line formed by the center column and the auxiliary positioning pins, and the distribution plate to be processed can be detachably fixed on the mounting seat.

2. The multi-station positioning and clamping auxiliary device for the valve plate processing center according to claim 1 is characterized in that: The distribution disc to be processed is pressed onto the mounting seat via a detachably connected pressing block.

3. The multi-station positioning and clamping auxiliary device for the valve plate machining center according to claim 1 is characterized in that: The lower end of the mounting seat is provided with a protrusion, and the base is provided with a groove that matches the size of the protrusion and can be embedded in the protrusion.

4. The multi-station positioning and clamping auxiliary device for the valve plate processing center according to claim 1 is characterized in that: The number of the mounting seats is 2-10.

5. The multi-station positioning and clamping auxiliary device for the valve plate processing center according to claim 1 is characterized in that: It also includes an auxiliary positioning moving device for moving and fixing the bottom plate, the auxiliary positioning moving device includes a workbench, a moving positioning mechanism arranged on the workbench and a negative pressure box arranged under the workbench, a fan and a dust bag are arranged in the negative pressure box; the workbench is provided with an air suction port connected to the negative pressure box in the transverse direction, and the air suction port is located below the machine tool manipulator; the bottom plate is provided with a plurality of first air holes, and the mounting seat is provided with a second air hole that fits the position of the first air hole; the waist-shaped groove is a through groove, and a plurality of slag suction holes are opened on the bottom plate located at the waist-shaped groove; The movable positioning mechanism includes a transverse push plate and a longitudinal push plate, two transverse push plates are symmetrically arranged along the longitudinal center line of the workbench, a cover plate that can cover the air intake port is detachably fixed at the lower end of the transverse push plate, and the cover plate is slidably connected to the table top of the workbench; the transverse push plate is provided with a first limit groove, the first limit groove is provided with a limit column, a spring is connected between the limit column and the bottom of the limit groove, and the two longitudinal side walls of the base plate are provided with a first positioning groove for the limit column to be embedded; the longitudinal push plate is slidably connected to the guide block of the base through a slider, the guide block is provided with a second limit groove, and the slider is provided with a second positioning groove, the angle between the first positioning groove, the second positioning groove and the center of the mounting seat is a right angle, and the intersection point of the straight lines of the first limit groove and the second limit groove is the machining center point of the manipulator.

6. The multi-station positioning and clamping auxiliary device for the valve plate processing center according to claim 5 is characterized in that: The bottom of the negative pressure box includes a fixed plate, a movable plate and a connecting soft plate. The movable plate is located below the air inlet. The connecting soft plates are arranged on both sides of the movable plate to connect the movable plate and the fixed plate. A lifting rod is arranged at the lower end of the movable plate.

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