A machining device for a pump shaft

Abstract

The utility model discloses a kind of processing devices for pump shaft, including rack, rack upper end is sequentially equipped with thread rolling mechanism, fixed clamp mechanism and auxiliary support mechanism from left to right. Fixed clamp mechanism contains mounting bracket, its upper end has lower clamp seat and hinged upper clamp seat, the inner edge of both and the outer side adjustable angle auxiliary clamp block inner edge are equipped with rubber clamp block with anti-skid line, lower, upper clamp seat outer side has arc convex block, auxiliary clamp block is bolted after adjusting angle over arc-shaped groove, and outer side is equipped with locking mechanism. Auxiliary support mechanism includes slide rail, sliding bracket and the support block of upper V. The device is through multiple rubber clamp block with anti-skid line to enhance clamping friction, cooperate adjustable auxiliary clamp block and V-shaped support block, effectively solve the problem of low precision caused by bar stock with oil and processing vibration, improve pump shaft processing precision and stability, adapt to different specifications pump shaft, with good practicality.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal pumps, specifically to a processing device for pump shafts. Background Technology

[0002] The pump shaft is the core transmission component of a centrifugal pump. Its main function is to transmit power and drive the impeller to rotate, thereby transporting fluid. The structural precision, strength, and surface quality of the pump shaft directly affect the operating efficiency, stability, and service life of the centrifugal pump. During the assembly process of a centrifugal pump, an external thread needs to be machined at the end of the pump shaft. This thread is used to connect and fix the pump shaft to the last stage impeller, ensuring that the impeller does not undergo axial displacement during high-speed rotation, thus guaranteeing the normal operation of the centrifugal pump.

[0003] However, pump shaft machining typically uses purchased metal bars as raw materials. During procurement, transportation, and storage, these bars often acquire an oil layer on their outer surface. While this oil layer serves primarily for rust prevention, it can negatively impact machining accuracy during subsequent processing. Specifically, when machining external threads on the pump shaft end, the bar needs to be securely clamped using a jig. The oil on the bar's surface reduces the friction between the jig and the bar, causing relative slippage during clamping, which in turn affects the positional and dimensional accuracy of the thread machining.

[0004] Meanwhile, during the machining of the pump shaft, the operation of the machining equipment (such as a thread rolling machine) generates vibrations. These vibrations are transmitted through the machine frame to the fixture and the clamped bar stock, causing the bar stock to be in an unstable vibration state during machining. On the one hand, the vibration causes a slight shift in the relative position between the thread rolling tool and the bar stock, affecting the thread profile accuracy and surface roughness. On the other hand, due to the excessive length of the pump shaft, the end is also prone to wobbling during machining, ultimately resulting in the machined external thread of the pump shaft failing to meet design requirements, increasing the product defect rate and raising production costs. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model aims to provide a machining device for pump shafts. Specifically, addressing the problem of low machining accuracy caused by oil on the outer surface of the bar stock, this application incorporates rubber clamping blocks on the inner edges of the lower clamping seat, upper clamping seat, and auxiliary clamping block of the fixed clamping mechanism. Rubber material itself has a high coefficient of friction, and the arc-shaped inner edge of the rubber clamping blocks has anti-slip textures. This ensures that even with oil on the bar stock surface, the rubber clamping blocks maintain significant friction with the bar stock, effectively reducing relative slippage during clamping and thus guaranteeing the positional and dimensional accuracy of the thread machining. Simultaneously, the elastic properties of the rubber clamping blocks allow them to closely conform to the bar stock surface, further enhancing clamping stability and reducing the impact of slippage caused by oil on machining accuracy.

[0007] To address the issue of low machining accuracy caused by vibration during processing, firstly, the lower and upper clamping seats in the fixed fixture mechanism are locked together by a locking mechanism, ensuring stable and reliable clamping force on the bar stock and reducing fluctuations in clamping force due to vibration. Secondly, the adjustable-angle auxiliary clamping block is fixed to the arc-shaped protrusion via an arc-shaped groove and bolts, allowing the clamping angle to be adjusted according to the specific shape and size of the bar stock. This ensures a tight fit between the auxiliary clamping block and the bar stock, further enhancing the clamping effect and suppressing the swaying of the bar stock during vibration. Additionally, the V-shaped support block in the auxiliary support mechanism effectively supports the other end of the pump shaft. The V-shaped structure has excellent positioning properties, reducing swaying of the pump shaft due to excessive cantilever length during vibration, further ensuring machining accuracy.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, the present invention provides the following technical solution: a processing device for pump shafts, comprising a frame, wherein the upper end of the frame is provided with a thread rolling mechanism, a fixing clamp mechanism and an auxiliary support mechanism arranged sequentially from left to right;

[0010] Preferably, the fixing clamp mechanism includes a mounting bracket, the upper end of which is equipped with a lower clamp seat and an upper clamp seat hinged to the lower clamp seat and capable of opening and closing. The inner edges of the lower clamp seat and the upper clamp seat are each provided with two sets of rubber clamping blocks, and the outer sides of the lower clamp seat and the upper clamp seat are also provided with adjustable angle auxiliary clamping blocks.

[0011] Preferably, the lower clamp seat and the upper clamp seat are provided with arc-shaped protrusions on their outer sides, and the auxiliary clamp block is provided with a through arc-shaped groove in the middle. The auxiliary clamp block can be adjusted by means of the arc-shaped groove, and after adjustment, it is fixed to the protrusion by bolts.

[0012] Preferably, the rubber clamp is arc-shaped, and its inner edge is provided with anti-slip texture.

[0013] Preferably, the inner edge of the auxiliary clamp block is also provided with a rubber clamp block.

[0014] Preferably, the auxiliary support mechanism includes a slide rail fixed to the upper end of the frame, a sliding bracket disposed on the upper end of the slide rail and slidably connected thereto, and a support block fixed to the upper end of the sliding bracket.

[0015] Preferably, the upper part of the support block is V-shaped.

[0016] Preferably, locking mechanisms are provided on the outer sides of the lower clamp seat and the upper clamp seat.

[0017] (III) Beneficial Effects

[0018] This utility model has the following beneficial effects:

[0019] First, it can significantly improve the machining accuracy of the pump shaft. By setting rubber clamping blocks with anti-slip textures on the inner edges of the lower clamping seat, upper clamping seat, and auxiliary clamping block of the fixed clamping mechanism, the friction with the bar stock is increased. Even if there is oil on the surface of the bar stock, it can effectively reduce relative slippage and ensure the positional and dimensional accuracy of the thread machining. At the same time, the cooperation of the multiple clamping structure and the auxiliary support mechanism reduces the impact of machining vibration on the pump shaft and improves the thread tooth profile accuracy and surface roughness.

[0020] Secondly, it enhances the stability of the processing. The elastic properties of the rubber clamping blocks make the clamping tighter, the locking mechanism ensures the stability of the clamping force, the adjustable angle of the auxiliary clamping blocks adapts to different bars, the V-shaped support blocks provide effective support for the pump shaft, and the high-strength frame reduces vibration transmission. Together, these features ensure that the pump shaft is not easily shaken or deformed during processing, reducing the probability of processing failures caused by instability.

[0021] Furthermore, it enhances the applicability and flexibility of the device. The auxiliary fixture block can be adjusted and fixed through the arc groove, adapting to the processing needs of pump shafts of different specifications and shapes. It eliminates the need for frequent fixture changes, saving changeover time and costs, and expanding the application range of the device.

[0022] Finally, it helps reduce production costs. Improved processing precision reduces the generation of defective products and lowers the scrap rate; the stable operation and adaptability of the equipment enhance processing efficiency, indirectly reducing production input, and thus has good economic benefits and practical value. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the entire present invention.

[0024] Figure 2 This is a schematic diagram of the fixing clamp mechanism in this utility model.

[0025] Figure 3This is a schematic diagram showing the opening of the fixing clamp mechanism in this utility model.

[0026] Figure 4 for Figure 3 An enlarged view of point A in the schematic diagram of the opening of the fixing clamp mechanism in this utility model.

[0027] Figure 5 This is a schematic diagram of the fixing clamp mechanism of this utility model after the auxiliary clamp block is removed.

[0028] Figure 6 for Figure 5 The enlarged view of section B in the overall schematic diagram of this utility model.

[0029] In the diagram: 1-frame, 2-thread rolling mechanism, 3-fixed clamping mechanism, 4-auxiliary support mechanism, 31-mounting bracket, 32-lower clamping seat, 33-upper clamping seat, 34-rubber clamping block, 35-auxiliary clamping block, 36-locking mechanism, 321-protrusion, 351-arc groove, 341-anti-slip texture, 41-slide rail, 42-sliding bracket, 43-support block. Detailed Implementation

[0030] The following will refer to the appendix in the example of this utility model. Figures 1-6 The technical solutions in the embodiments of this utility model are clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0031] like Figures 1-6 As shown, this utility model provides a processing device for pump shafts, including a frame 1. The frame 1 serves as the basic support component of the entire device and is welded from high-strength steel, exhibiting good structural stability. At the upper end of the frame 1, a thread rolling mechanism 2, a fixing clamp mechanism 3, and an auxiliary support mechanism 4 are sequentially fixedly installed horizontally from left to right. The positional relationships between these mechanisms are precisely calibrated to ensure coaxiality requirements during pump shaft processing.

[0032] The fixing clamp mechanism 3 is the core component for securely clamping the pump shaft, and it includes a mounting bracket 31. The mounting bracket 31 is fastened to the frame 1 with bolts. The upper end of the mounting bracket 31 is equipped with a lower clamp seat 32, which is an integral structure with the mounting bracket 31 or fixedly connected by welding. The upper clamp seat 33 is hinged to the lower clamp seat 32 via a hinge shaft, allowing the upper clamp seat 33 to rotate around the hinge shaft, thereby realizing the opening and closing action to facilitate the clamping and disassembly of the pump shaft.

[0033] Two sets of rubber clamping blocks 34 are fixedly installed on the inner edges of both the lower clamping seat 32 and the upper clamping seat 33 by bolts. The rubber clamping blocks 34 are made of wear-resistant and elastic rubber material. Their installation can prevent the clamping seat from directly contacting the pump shaft and causing damage to the surface of the pump shaft. At the same time, the elasticity of the rubber can enhance the clamping force on the pump shaft and improve the stability of the clamping.

[0034] To accommodate the clamping requirements of pump shafts of different specifications, adjustable auxiliary clamping blocks 35 are also provided on the outer sides of the lower clamping seat 32 and the upper clamping seat 33. Specifically, an arc-shaped protrusion 321 is integrally formed on the outer side of the lower clamping seat 32 and the upper clamping seat 33, and an arc-shaped groove 351 is formed through the middle of the auxiliary clamping block 35. The curvature of the arc-shaped groove 351 matches the curvature of the arc-shaped protrusion 321. The auxiliary clamping block 35 is fitted onto the arc-shaped protrusion 321 through the arc-shaped groove 351. When it is necessary to adjust the angle of the auxiliary clamping block 35, the bolt is loosened, and the auxiliary clamping block 35 is pushed to move along the curvature direction of the arc-shaped protrusion 321, thereby realizing the adjustment of the rotation angle. After the angle is adjusted, the auxiliary clamping block 35 is fastened to the arc-shaped protrusion 321 by bolts passing through the arc-shaped groove 351, thus completing the angle fixation of the auxiliary clamping block 35.

[0035] The inner edge of the auxiliary clamp block 35 is also fixed with a rubber clamp block 34 by bolts. The rubber clamp block 34 has the same specifications as the rubber clamp block 34 on the inner edge of the lower clamp seat 32 and the upper clamp seat 33, which further enhances the clamping effect on the pump shaft.

[0036] The rubber clamp 34 is arc-shaped, and its inner edge is provided with anti-slip texture 341. The anti-slip texture 341 is distributed in a spiral or dot pattern, which can increase the friction between the rubber clamp 34 and the pump shaft surface, effectively prevent the pump shaft from sliding during processing, and ensure processing accuracy.

[0037] The auxiliary support mechanism 4 is used to support the other end of the pump shaft to prevent deformation of the pump shaft due to excessive cantilever length during processing. The auxiliary support mechanism 4 includes a slide rail 41 fixed to the upper end of the frame 1, which is bolted to the frame 1. A sliding bracket 42 is located on the upper end of the slide rail 41 and slidably connected to it. The sliding bracket 42 can move along the length of the slide rail 41 to accommodate pump shafts of different lengths. A support block 43 is fixed to the upper end of the sliding bracket 42. The upper part of the support block 43 is V-shaped; the V-shaped structure provides good positioning and support for the pump shaft, ensuring its stability during processing.

[0038] In addition, a locking mechanism 36 is provided on the outside of the lower clamping seat 32 and the upper clamping seat 33. After the pump shaft is clamped, the upper clamping seat 33 and the lower clamping seat 32 are locked by the locking mechanism 36 to ensure that the clamping force of the clamp on the pump shaft is stable and reliable, and to prevent the upper clamping seat 33 from opening accidentally during the processing.

[0039] Working principle:

[0040] Before processing, adjust the position of the sliding bracket 42 in the auxiliary support mechanism 4 on the slide rail 41 according to the length of the pump shaft to be processed, so that the support block 43 can effectively support the end of the pump shaft away from the thread rolling mechanism 2, and then fix the sliding bracket 42.

[0041] Next, open the upper clamping seat 33 of the fixing fixture mechanism 3, and place the purchased bar stock onto the rubber clamping block 34 on the inner edge of the lower clamping seat 32, so that the end of the bar stock to be machined with external threads faces the thread rolling mechanism 2. According to the diameter and shape of the bar stock, adjust the angle of the auxiliary clamping block 35 through the arc groove 351 so that the rubber clamping block 34 on the inner edge of the auxiliary clamping block 35 fits against the surface of the bar stock. After adjustment, fix the auxiliary clamping block 35 onto the arc protrusion 321 with bolts.

[0042] Then, close the upper clamp seat 33 so that the rubber clamp block 34 on the inner edge of the upper clamp seat 33 is in close contact with the bar stock. Then, lock the upper clamp seat 33 and the lower clamp seat 32 through the locking mechanism 36. At this time, the bar stock is firmly clamped.

[0043] During processing, the thread rolling mechanism 2 is activated, and its thread rolling wheel begins to rotate. Under the action of clamping force, the bar stock rotates with the rotation of the thread rolling wheel. The thread rolling wheel contacts the end of the bar stock and squeezes it, gradually processing the required external thread.

[0044] Throughout the processing, the anti-slip texture 341 of the rubber clamping block 34 increases the friction with the bar stock. Combined with the clamping of the auxiliary clamping block 35, it effectively prevents the bar stock from sliding due to oil on the surface or processing vibration. The V-shaped support block 43 supports the other end of the bar stock to prevent the bar stock from bending and deforming due to excessive cantilever length. The frame 1 provides stable support and reduces vibration transmission. The coordinated action of each mechanism ensures that the thread rolling process can be carried out accurately and stably, and finally completes the processing of the external thread at the pump shaft end.

[0045] After processing, close the thread rolling mechanism 2, loosen the locking mechanism 36, open the upper clamping seat 33, and remove the processed pump shaft. To process pump shafts of different specifications, repeat the above adjustment steps.

[0046] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A machining apparatus for pump shafts, comprising a frame (1), characterized in that, The upper end of the frame (1) is provided with a thread rolling mechanism (2), a fixing clamp mechanism (3) and an auxiliary support mechanism (4) arranged from left to right. The fixed clamp mechanism (3) includes a mounting bracket (31). The upper end of the mounting bracket (31) is equipped with a lower clamp seat (32) and an upper clamp seat (33) hinged to the lower clamp seat (32) and capable of opening and closing. The inner edges of the lower clamp seat (32) and the upper clamp seat (33) are provided with two sets of rubber clamping blocks (34). The outer sides of the lower clamp seat (32) and the upper clamp seat (33) are also provided with adjustable angle auxiliary clamping blocks (35). The lower clamp seat (32) and the upper clamp seat (33) are provided with arc-shaped protrusions (321) on their outer sides. The auxiliary clamp block (35) has a through arc-shaped groove (351) in the middle. The auxiliary clamp block (35) can adjust the rotation angle through the arc-shaped groove (351). After adjustment, it is fixed to the protrusion (321) by bolts.

2. The machining device for a pump shaft according to claim 1, characterized in that, The rubber clamp (34) is arc-shaped, and its inner edge is provided with anti-slip texture (341).

3. The machining apparatus for a pump shaft according to claim 1, characterized in that, The inner edge of the auxiliary clamp block (35) is provided with a rubber clamp block (34).

4. The machining apparatus for a pump shaft according to claim 1, characterized in that, The auxiliary support mechanism (4) includes a slide rail (41) fixed to the upper end of the frame (1), a sliding bracket (42) provided on the upper end of the slide rail (41) and slidably connected, and a support block (43) fixed to the upper end of the sliding bracket (42).

5. The machining apparatus for a pump shaft according to claim 4, characterized in that, The upper part of the support block (43) is V-shaped.

6. The machining apparatus for a pump shaft according to claim 1, characterized in that, Locking mechanisms (36) are provided on the outer sides of the lower clamp seat (32) and the upper clamp seat (33).

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