Crosshead guide plate machining tool

Abstract

The crosshead guide plate machining tool comprises a supporting device, a four-axis rotary table and a tailstock, the supporting device comprises a base plate and supporting discs fixed to the front end and the rear end of the base plate, a clamping assembly is arranged on the base plate, and the clamping assembly is configured to fix a crosshead guide plate; the two supporting discs are connected to the four-axis rotary table and the tailstock respectively, and the four-axis rotary table and the tailstock are configured to drive the supporting device to rotate around the center axes of the supporting discs so as to drive the crosshead guide plate on the base plate to rotate around the center axes of the supporting discs. According to the crosshead guide plate machining tool, the rotation angle of the crosshead guide plate is accurately positioned, and the machining precision is improved; moreover, the crosshead guide plate does not need to be repeatedly clamped, so that the labor intensity of workers is reduced, and the machining efficiency is effectively improved; in addition, cradle type movement of the crosshead guide plate can be achieved only by using the four-axis machining center rotary supporting device, the structure is simple, and cost is low.

Description

Technical Field

[0001] This utility model relates to the field of tooling technology, specifically to tooling for machining crosshead guide plates. Background Technology

[0002] In pumps such as mud pumps and oil pumps, the crosshead is a crucial component connecting the piston and connecting rod. During operation, the crosshead moves within upper and lower guide plates, which support and guide its reciprocating motion. In existing technology, the crosshead guide plates are typically manufactured by first drilling and cutting a whole tubular galvanized iron sheet, then dividing the galvanized iron into four equal parts to obtain four arc-shaped crosshead guide plates.

[0003] To improve the overall performance of the crosshead guide plate, the inventors aim to provide a carbon steel crosshead guide plate with a copper coating layer processed on its inner wall to create a composite metal, thereby enhancing the guide plate's strength, thermal conductivity, and wear resistance, and extending its service life. However, the copper layer has low strength and is prone to deformation. Therefore, in manufacturing the crosshead guide plate, it is necessary to first divide the tubular composite metal into four equal parts to obtain four guide plates, and then perform drilling and cutting operations on the guide plates.

[0004] Since the curved surface and four sides of the crosshead guide plate all require machining, directly clamping and machining the guide plate using a traditional four-axis machining center cannot guarantee that the tilt angles of the two symmetrical end faces of the guide plate relative to the worktable are consistent after the four-axis rotary table rotates. This means that after machining each face of the guide plate, it needs to be re-clamped, aligned, and the machining zero point needs to be checked, resulting in low positioning accuracy and complex operation, leading to low machining efficiency. While using a five-axis machining center, which offers higher positioning accuracy and machining efficiency, eliminates the need for repeated clamping during guide plate machining, the programming and control operations of a five-axis machining center are more complex and expensive.

[0005] Therefore, designing a crosshead guide plate machining fixture that is highly accurate in positioning, easy to operate, and low in cost has become the main problem that needs to be solved. Summary of the Invention

[0006] In view of the aforementioned defects or deficiencies in the prior art, it is desirable to provide a machining fixture for a crosshead guide plate. The crosshead guide plate rotates entirely around the central axis of the support plate, thereby ensuring precise positioning of the crosshead guide plate's rotation angle. This facilitates the milling cutter's alignment with each end face of the crosshead guide plate for machining operations, thus improving machining accuracy. Furthermore, adjusting the crosshead guide plate's angle does not require disassembling and reclamping it from the base plate, reducing the labor intensity of workers and effectively improving machining efficiency. Moreover, the cradle-like motion of the crosshead guide plate can be achieved using only a four-axis machining center rotary support device, resulting in a simple structure and low cost.

[0007] The effect of this utility model is achieved as follows:

[0008] This application provides a crosshead guide plate processing fixture, including a support device, a four-axis rotary table, and a tailstock. The support device includes a base plate and support plates fixed at the front and rear ends of the base plate. A clamping assembly is provided on the base plate, and the clamping assembly is configured to fix the crosshead guide plate. Two support plates are respectively connected to the four-axis rotary table and the tailstock. The four-axis rotary table and the tailstock are configured to drive the support device to rotate around the central axis of the support plates, thereby driving the crosshead guide plate on the base plate to rotate around the central axis of the support plates.

[0009] Furthermore, the four-axis rotary table includes a jaw disk, which is coaxial with a support disk. The jaw disk is configured to clamp the support disk and drive it to rotate around the central axis. The jaw disk has multiple radially movable jaws, which makes the clamping operation of the support device convenient and highly stable.

[0010] Furthermore, the tailstock includes an ejector pin, which can rotate around its own central axis and move axially. The ejector pin and the support plate are coaxial, and the ejector pin is configured to move toward the support plate until it clamps the support device between the four-axis rotary table and the tailstock. After one end of the support device is fixed to the four-axis rotary table by a jaw plate, the support device can be fixed to the four-axis machining center simply by moving the ejector pin to push the other end of the support device, further improving the ease of clamping and operation of the support device and providing better stability.

[0011] Furthermore, the ejector pin has a conical structure, and a conical positioning hole is formed in the recess on the side of the support plate near the tailstock. The ejector pin is engaged with the support plate through the positioning hole. This ensures that after the ejector pin is engaged in the positioning hole, the support plate and the ejector pin are relatively fixed in the radial direction, resulting in higher connection strength and better stability between the two.

[0012] Furthermore, the clamping assembly includes several support members connected to the substrate and a clamping plate slidably connected to the substrate in a vertical direction. The support members are configured to support the bottom of the crosshead guide plate, and the clamping plate is configured to press the crosshead guide plate against the support members. This makes the clamping operation of the crosshead guide plate relatively simple.

[0013] Furthermore, the top of the support member is recessed downwards to form an arc-shaped support surface, which is configured to fit the bottom surface of the crosshead guide plate. By setting an arc-shaped support surface that fits the shape of the crosshead guide plate, the connection strength between the crosshead guide plate and the support member is higher and the stability is better.

[0014] Furthermore, the upper end of the support member is recessed to form several clearance holes, which are configured as clearance milling cutters. When making holes, the milling cutter can directly align with the clearance holes on the support member, which not only improves the stability of the milling operation, but also allows the milling cutter to mill the mounting hole in one go, thus making the machining operation of the crosshead guide plate simpler and more efficient.

[0015] Furthermore, the clamping assembly also includes a threaded rod vertically disposed on the base plate and a fastening nut threadedly connected to the threaded rod. A through hole is vertically perforated on the clamping plate, through which the clamping plate is slidably connected to the threaded rod. The fastening nut is configured to abut against the top of the clamping plate, thereby limiting the maximum adjustable height of the clamping plate. This makes the height adjustment of the clamping plate not only convenient but also provides a more stable clamping effect on the crosshead guide plate.

[0016] Furthermore, the clamping assembly also includes a positioning stage disposed on the substrate. The positioning stage is configured to support the bottom end of the clamping plate, thereby limiting the minimum adjustment height of the clamping plate. When the clamping plate slides down to abut against the crosshead guide plate, it is supported by the positioning stage and cannot slide down further, allowing the clamping plate to press firmly against the crosshead guide plate, resulting in good stability.

[0017] Furthermore, a buffer element made of flexible material is provided at the lower end of the clamping plate. This reduces the pressure on the inner wall of the crosshead guide plate, thereby preventing excessive clamping force from causing dents and ensuring product quality.

[0018] The crosshead guide plate machining fixture provided in this application fixes the crosshead guide plate to the base plate, and the four-axis rotary table and tailstock drive the entire support device to rotate around the central axis of the support plate. This means the entire crosshead guide plate rotates around the central axis of the support plate, resulting in precise positioning of the crosshead guide plate's rotation angle. This facilitates the milling cutter's alignment with each end face of the crosshead guide plate for machining operations, thereby improving machining accuracy. Furthermore, adjusting the crosshead guide plate's angle does not require disassembling and re-clamping it from the base plate. This eliminates the need for alignment and zero-point calibration each time the crosshead guide plate is machined on different end faces, reducing the labor intensity of workers and effectively improving machining efficiency. Moreover, the cradle-like motion of the crosshead guide plate can be achieved using only a four-axis machining center rotary support device, resulting in a simple structure and low cost. Attached Figure Description

[0019] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0020] Figure 1 A three-dimensional structural schematic diagram of the crosshead guide plate machining fixture provided in the embodiments of this application;

[0021] Figure 2 A three-dimensional structural schematic diagram of the crosshead guide plate machining fixture when the support device provided in the embodiment of this application rotates;

[0022] Figure 3 A schematic diagram of the connection structure between the four-axis rotary table, tailstock, and support device provided in an embodiment of this application;

[0023] Figure 4This is a schematic diagram of the connection structure between the crosshead guide plate and the support member provided in an embodiment of this application;

[0024] Figure 5 This is a schematic diagram of the connection structure between the clamping component and the substrate provided in an embodiment of this application;

[0025] Figure 6 This is a schematic diagram illustrating the change process of the clamping component clamping the substrate provided in the embodiments of this application;

[0026] Figure 7 A cross-sectional structural schematic diagram of the crosshead guide plate machining tooling provided in the embodiments of this application;

[0027] Figure 8 This is a cross-sectional structural diagram of the crosshead guide plate machining fixture when the support device provided in the embodiment of this application rotates.

[0028] The reference numerals in the attached figures are as follows: 1-support device, 110-base plate, 120-support plate, 121-positioning hole, 130-support component, 131-support surface, 132-clearance hole, 140-clamping plate, 141-through hole, 142-buffer component, 150-threaded rod, 160-fastening nut, 170-positioning table, 2-four-axis rotary table, 210-claw plate, 3-tailstock, 310-ejector pin, 4-crosshead guide plate, 401-mounting hole, 5-milling cutter. Detailed Implementation

[0029] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0030] Please refer to the attached document. Figure 1-8 This application provides a crosshead guide plate processing fixture, including a support device 1, a four-axis rotary table 2, and a tailstock 3. The support device 1 includes a base plate 110 and support disks 120 fixed at the front and rear ends of the base plate 110. A clamping assembly is provided on the base plate 110, and the clamping assembly is configured to fix the crosshead guide plate 4. The two support disks 120 are respectively connected to the four-axis rotary table 2 and the tailstock 3. The four-axis rotary table 2 and the tailstock 3 are configured to drive the support device 1 to rotate around the central axis of the support disks 120, thereby driving the crosshead guide plate 4 on the base plate 110 to rotate around the central axis of the support disks 120.

[0031] In this embodiment, by fixing the crosshead guide plate 4 to the base plate 110, and the four-axis turntable 2 and tailstock 3 driving the support device 1 to rotate around the central axis of the support disk 120, that is, the crosshead guide plate 4 rotates around the central axis of the support disk 120, thereby making the rotation angle positioning of the crosshead guide plate 4 accurate, as shown in the attached figure. Figure 7 and attached Figure 8 As shown, this design facilitates the alignment of the milling cutter 5 with each end face of the crosshead guide plate 4 for machining operations, thereby improving machining accuracy. Furthermore, adjusting the angle of the crosshead guide plate 4 does not require disassembling and re-clamping it from the base plate 110. This means that when machining different end faces of the crosshead guide plate 4, it is not necessary to perform alignment and zero-point calibration each time, thus reducing the labor intensity of workers and effectively improving machining efficiency. Moreover, the cradle-like movement of the crosshead guide plate 4 can be achieved using only the four-axis machining center rotary support device 1, resulting in a simple structure and low cost.

[0032] Please refer to the attached document. Figure 3 In some embodiments of this application, the four-axis rotary table 2 includes a jaw disk 210, which is coaxial with a support disk 120. The jaw disk 210 is configured to clamp the support disk 120 and drive the support disk 120 to rotate together around the central axis. The jaw disk 210 has multiple grippers that can move radially, which makes the clamping operation of the support device 1 convenient and provides strong stability.

[0033] Please refer to the attached document. Figure 3 In some embodiments of this application, the tailstock 3 includes an ejector pin 310, which is rotatable around its own central axis and axially movable. The ejector pin 310 and the support plate 120 are coaxial. The ejector pin 310 is configured to move toward the support plate 120 until it clamps the support device 1 between the four-axis rotary table 2 and the tailstock 3. One end of the support device 1 is fixed to the rear 2 of the four-axis rotary table by a claw plate 210. The support device 1 can be fixed to the four-axis machining center simply by moving the ejector pin 310 to push the other end of the support device 1, further improving the ease of clamping operation of the support device 1 and providing better stability.

[0034] Of course, in other embodiments of this application, the tailstock 3 may also be provided with a claw plate clamping support plate 120.

[0035] Please refer to the attached document. Figure 3 In some embodiments of this application, the ejector pin 310 has a tapered structure, and a tapered positioning hole 121 is recessed on the side of the support plate 120 near the tailstock 3. The ejector pin 310 is engaged with the support plate 120 through the positioning hole 121. After the ejector pin 310 is engaged with the positioning hole 121, the support plate 120 and the ejector pin 310 are relatively fixed in the radial direction, resulting in higher connection strength and better stability between the two.

[0036] Please refer to the attached document. Figure 4 and attached Figure 6In some embodiments of this application, the clamping assembly includes a plurality of support members 130 connected to the substrate 110 and a clamping plate 140 slidably connected to the substrate 110 in a vertical direction. The support members 130 are configured to support the bottom of the crosshead guide plate 4, and the clamping plate 140 is configured to press the crosshead guide plate 4 against the support members 130.

[0037] In this embodiment, after the crosshead guide plate 4 is placed on the support member 130, the clamping plate 140 only needs to be slid down to press the crosshead guide plate 4 against the support member 130, thereby fixing the crosshead guide plate 4 to the support device 1. Conversely, the crosshead guide plate 4 can be disassembled, making the clamping operation of the crosshead guide plate 4 relatively simple.

[0038] Please refer to the attached document. Figure 4 In some embodiments of this application, the top end of the support member 130 is recessed downward to form an arc-shaped support surface 131, which is configured to fit against the bottom surface of the crosshead guide plate 4. By setting an arc-shaped support surface that fits the shape of the crosshead guide plate 4, the connection strength between the crosshead guide plate 4 and the support member 130 is higher and the stability is better.

[0039] Please refer to the attached document. Figure 4 and attached Figure 7 In some embodiments of this application, the upper end of the support member 130 is recessed to form a plurality of clearance holes 132, and the clearance holes 132 are configured to avoid milling cutters.

[0040] In this embodiment, during the processing of the crosshead guide plate 4, several mounting holes 401 for positioning the guide plate onto the pump body need to be milled inside. The mounting holes 401 of the crosshead guide plate 4 are aligned by setting clearance holes 132, as shown in the attached figure. Figure 7 As shown, the milling cutter 5 can directly align with the clearance hole 132 on the support member 130 when making a hole, which not only makes the milling operation more stable, but also allows the milling cutter 5 to mill the mounting hole 401 in one go, making the machining operation of the crosshead guide plate 4 simpler and more efficient.

[0041] Preferably, two support members 130 are fixed on the base plate 110, and a pair of symmetrical clearance holes 132 are opened on the support members 130, so as to correspond one-to-one with the mounting holes 401 that need to be processed on the crosshead guide plate 4.

[0042] Please refer to the attached document. Figure 4 and attached Figure 6In some embodiments of this application, the clamping assembly further includes a threaded rod 150 vertically disposed on the base plate 110 and a fastening nut 160 threadedly connected to the threaded rod 150. A through hole 141 is provided vertically on the clamping plate 140. The clamping plate 140 is slidably connected to the threaded rod 150 through the through hole 141. The fastening nut 160 is configured to abut against the top of the clamping plate 140 to limit the maximum adjustable height of the clamping plate 140.

[0043] In this embodiment, the clamping plate 140 slides along the threaded rod 150 and is pressed by the fastening nut 160 screwed onto the threaded rod 150. The height of the clamping plate 140 can be adjusted by tightening the fastening nut 160, thereby pressing or avoiding the crosshead guide plate 4. This makes the height adjustment of the clamping plate 140 not only simple, but also provides a relatively stable clamping effect on the crosshead guide plate 4.

[0044] Preferably, the base plate 110 is provided with two sets of threaded rods 150 and clamping plates 140, and the support device 1 clamps the front and rear sides of the crosshead guide plate 4 respectively through the two sets of clamping plates 140, thereby making the clamping stability between the crosshead guide plate 4 and the support device 1 higher.

[0045] Please refer to the attached document. Figure 4 and attached Figure 6 In some embodiments of this application, the clamping assembly further includes a positioning stage 170 disposed on the substrate 110, the positioning stage 170 being configured to support the bottom end of the clamping plate 140 thereby limiting the minimum adjustment height of the clamping plate 140.

[0046] In this embodiment, the height of the positioning platform 170 and the height of the crosshead guide plate 4 after being placed on the support member 130 are close. A through hole 141 is opened in the middle of the clamping plate 140. One side of the clamping plate 140 is pressed against the top of the crosshead guide plate 4, and the other side is pressed against the top of the positioning platform 170. This ensures that when the clamping plate 140 slides down to abut against the crosshead guide plate 4, it is supported by the positioning platform 170 and cannot continue to slide down, thereby preventing the clamping plate 140 from sliding down further and affecting the clamping strength. This allows the clamping plate 140 to press firmly against the crosshead guide plate 4, resulting in good stability.

[0047] Please refer to the attached document. Figure 6 In some embodiments of this application, a buffer 142 is provided at the lower end of the clamping plate 140, and the buffer 142 is made of a flexible material.

[0048] In this embodiment, the inner wall of the crosshead guide plate 4 is made of copper, a material with low hardness. When subjected to high pressure, the inner wall of the crosshead guide plate 4 is prone to deformation. Therefore, by providing a flexible buffer 142 at the lower end of the clamping plate 140, the pressure on the inner wall of the crosshead guide plate 4 is reduced, thereby preventing excessive clamping force of the clamping plate 140 from causing dents and ensuring product quality.

[0049] The material of the buffer 142 can be rubber, sponge, nylon, etc.

[0050] It should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" used above to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means three or more.

[0051] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A tooling for machining a crosshead guide plate, characterized in that, The system includes a support device (1), a four-axis turntable (2), and a tailstock (3). The support device (1) includes a base plate (110) and support disks (120) fixed at the front and rear ends of the base plate (110). A clamping assembly is provided on the base plate (110), and the clamping assembly is configured to fix a crosshead guide plate (4). The two support disks (120) are respectively connected to the four-axis turntable (2) and the tailstock (3). The four-axis turntable (2) and the tailstock (3) are configured to drive the support device (1) to rotate around the central axis of the support disk (120), thereby driving the crosshead guide plate (4) on the base plate (110) to rotate around the central axis of the support disk (120).

2. The tooling for machining the crosshead guide plate according to claim 1, characterized in that, The four-axis turntable (2) includes a claw disk (210), which is coaxial with the support disk (120). The claw disk (210) is configured to clamp the support disk (120) and drive the support disk (120) to rotate together around the central axis.

3. The tooling for machining the crosshead guide plate according to claim 1, characterized in that, The tailstock (3) includes a ejector pin (310) which is rotatable about its own central axis and can move axially. The ejector pin (310) and the support plate (120) are coaxial. The ejector pin (310) is configured to move toward the support plate (120) until the support device (1) is clamped between the four-axis turntable (2) and the tailstock (3).

4. The tooling for machining the crosshead guide plate according to claim 3, characterized in that, The ejector pin (310) has a conical structure. The support plate (120) has a conical positioning hole (121) recessed on the side near the tailstock (3). The ejector pin (310) is engaged with the support plate (120) through the positioning hole (121).

5. The tooling for machining the crosshead guide plate according to claim 1, characterized in that, The clamping assembly includes a plurality of support members (130) connected to the substrate (110) and a clamping plate (140) slidably connected to the substrate (110) in a vertical direction. The support members (130) are configured to support the bottom of the crosshead guide plate (4), and the clamping plate (140) is configured to press the crosshead guide plate (4) against the support members (130).

6. The tooling for machining the crosshead guide plate according to claim 5, characterized in that, The top of the support member (130) is recessed downward to form an arc-shaped support surface (131), which is configured to fit the bottom surface of the crosshead guide plate (4).

7. The tooling for machining the crosshead guide plate according to claim 5, characterized in that, The upper end of the support member (130) is recessed to form a plurality of clearance holes (132), and the clearance holes (132) are configured to be clearance milling cutters.

8. The tooling for machining the crosshead guide plate according to claim 5, characterized in that, The clamping assembly further includes a threaded rod (150) vertically disposed on the base plate (110) and a fastening nut (160) threadedly connected to the threaded rod (150). A through hole (141) is provided vertically on the clamping plate (140). The clamping plate (140) is slidably connected to the threaded rod (150) through the through hole (141). The fastening nut (160) is configured to abut against the top of the clamping plate (140) to limit the maximum adjustment height of the clamping plate (140).

9. The tooling for machining the crosshead guide plate according to claim 5, characterized in that, The clamping assembly further includes a positioning stage (170) disposed on the substrate (110), the positioning stage (170) being configured to support the bottom end of the clamping plate (140) thereby limiting the minimum adjustable height of the clamping plate (140).

10. The tooling for machining the crosshead guide plate according to claim 5, characterized in that, The lower end of the clamping plate (140) is provided with a buffer (142), which is made of a flexible material.

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