Plunger double-end-face grinding device

Abstract

The utility model discloses a plunger double end face grinding device which comprises a lower grinding disc (1), an upper grinding disc (2) and a grinding clamp (3) eccentrically arranged between the lower grinding disc (1) and the upper grinding disc (2), a mounting hole (4) is formed in the middle of the grinding clamp (3), a plurality of sets of evenly-distributed limiting grooves (5) are formed outside the mounting hole (4), and an eccentric screw (6) is arranged at the upper end of the lower grinding disc (1). The technical problems of plunger outer circle size consistency and quality stability are solved, meanwhile, the machining method can achieve batch production by replacing manual work with machinery, the part quality is guaranteed, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of grinding devices, in particular to a kind of plunger double-end face grinding device. BACKGROUND

[0002] Hydraulic plunger pump and hydraulic motor are one of the most important hydraulic components in modern aviation, spaceborne equipment. With the rapid development of aviation, navigation, spaceflight and other fields, the requirements for hydraulic plunger pump are also getting higher and higher, especially the core part of hydraulic plunger pump-rotor and plunger assembly. The assembly components involve the composition of the shoe and the plunger body to form the plunger assembly, and then matched with the rotor to form the rotor and plunger assembly, which is the core component of the hydraulic pump. As the core part of the hydraulic plunger pump-plunger component, the outer circle of the plunger body in the plunger component needs to be matched with the plunger hole of the rotor, ensuring that the cooperation gap tolerance is within 0.005 millimeters. The processing precision and consistency of the outer circle of the plunger body are required to be high. Therefore, the plunger outer circle and the rotor hole need to be matched by grinding processing to meet the precision requirements of the parts.

[0003] For a long time, the processing of plunger components in hydraulic pumps is in the form of first closing the shoe and then performing matching and matching of the plunger outer circle (ensuring the cooperation gap with the plunger hole of the rotor). The matching and matching processing is a single piece of manual plunger outer circle grinding, which is low in efficiency and low in first pass yield. SUMMARY

[0004] The utility model aims at providing a kind of plunger double-end face grinding device. It solves the technical problems of plunger outer circle size consistency and quality stability, and the processing method can realize batch production by replacing manual work with machinery, which not only ensures the quality of parts, but also improves production efficiency.

[0005] The technical scheme of the utility model: a kind of plunger double-end face grinding device, including lower grinding disc, upper grinding disc, eccentrically arranged in lower grinding disc and upper grinding disc grinding fixture, the middle part of the grinding fixture is provided with mounting hole, and mounting hole is provided with multiple groups of evenly distributed limit slot, and the upper end of lower grinding disc is provided with eccentric screw.

[0006] In the foregoing plunger double-end face grinding device, the upper end of the lower grinding disc is provided with a groove in the middle, and the width of the contact surface between the groove outside and the grinding fixture is greater than the length of the workpiece.

[0007] In the foregoing plunger double-end face grinding device, the number of limit slots is 18 groups, the included angle of plunger axis in adjacent limit slots is 20 degrees, the distance between limit slot and outer edge of grinding fixture is 1.5-3 millimeters, and the chamfer of limit slot is not less than 0.5×45°.

[0008] Compared with the prior art, the utility model has the following advantages:

[0009] The application can improve the grinding efficiency and the grinding precision is higher than artificial grinding by setting the grinding clamp between the lower grinding disc and the upper grinding disc and setting multiple sets of limiting grooves in the grinding clamp, and the grinding clamp is eccentrically arranged on the lower grinding disc, so that the plunger can slide relative to the upper grinding disc and the lower grinding disc during the rotation of the grinding clamp, and the processing effect is better. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is a structural schematic view of the utility model;

[0011] Figure 2 It is a structural schematic view of the lower grinding disc and the grinding clamp of the utility model;

[0012] Figure 3 It is a structural schematic view of the lower grinding disc of the utility model;

[0013] Figure 4 It is a structural schematic view of the grinding clamp of the utility model.

[0014] The marks in the drawings are: 1-lower grinding disc, 2-upper grinding disc, 3-grinding clamp, 4-mounting hole, 5-limiting groove, 6-eccentric screw, 7-groove. DETAILED DESCRIPTION

[0015] The utility model will be further described in combination with examples, but it is not as the basis for limiting the utility model.

[0016] Example. A plunger double-end-face grinding device is constituted as shown in Figures 1-4 It comprises a lower grinding disc 1, an upper grinding disc 2 and a grinding clamp 3 eccentrically arranged between the lower grinding disc 1 and the upper grinding disc 2, the grinding clamp 3 is provided with a mounting hole 4 in the middle, a plurality of uniformly distributed limiting grooves 5 are arranged outside the mounting hole 4, and the lower grinding disc 1 is provided with an eccentric screw 6 at the upper end.

[0017] The lower grinding disc 1 is provided with a groove 7 in the middle of the upper end, and the width of the contact surface between the groove 7 outside and the grinding clamp 3 is greater than the length of the workpiece.

[0018] The number of the limiting grooves 5 is 18 sets, the included angle of the plunger axis in the adjacent limiting grooves 5 is 20 degrees, the distance between the limiting grooves 5 and the outer edge of the grinding clamp 3 is 1.5-3 mm, and the chamfer of the limiting grooves 5 is not less than 0.5*45°.

[0019] The application is used for grinding plunger, and the outer circle of plunger is usually ground by hand, which not only has low grinding efficiency, but also cannot reach the standard in one grinding and needs multiple grinding and detection, which greatly increases the workload. Therefore, the existing double-end surface grinder is improved, mainly the lower grinding disc is improved, and the grinding clamp 3 is eccentrically arranged on the lower grinding disc 1, so that the plunger can rotate relative to the lower grinding disc 1 and the upper grinding disc 2 to realize the grinding of the plunger. The lower grinding disc 1 and the upper grinding disc 2 are flat disc plates made of cast iron and provided with a groove in the middle, the lower grinding disc 1 is provided with an eccentric screw 6, that is, the eccentric screw 6 is not on the same straight line as the axis of the lower grinding disc 1 and is parallel to each other, and the plunger not only rotates around the axis under the limiting of the grinding clamp, but also moves linearly along the axis, simulating the manual grinding process of the plunger, which has the advantages of ensuring the uniformity of the plunger outer circle grinding quality and the consistency of the outer circle size, reducing the wear of the grinding disc, and when adjusting the position of the eccentric screw, the larger the eccentricity is, the better, the longer the sliding displacement of the plunger on the grinding disc is in the processing process, the more sufficient the plunger and the grinding disc grinding plane contact, and the longer the sliding displacement is, the more it can reduce the wear of the grinding disc and better ensure the consistency of the plunger outer circle processing quality. The grinding clamp 3 is made of cloth-based bakelite material, which has the characteristics of corrosion resistance, heat resistance, wear resistance, low friction coefficient and the like. The number of limiting grooves in the grinding clamp 3 is adjusted according to the diameter of the plunger outer circle, the length of the limiting groove is greater than the length of the part and does not exceed the length of the part by 1mm, the width of the limiting groove 5 is greater than the diameter of the part by 0.4mm, the thickness of the grinding clamp 3 needs to be greater than the outer circle radius of the part, the distance between the limiting groove 5 and the outer edge of the grinding clamp 3 is 1.5-3mm, and the chamfer of the limiting groove 5 is not less than 0.5x45°. If the center line angle of adjacent limiting grooves is set to 20 degrees, 18 groups of plungers can be processed at the same time. When processing, clean the parts and put them into the limiting groove 5 of the grinding clamp 3, brush the grinding liquid on the outer surface of the plunger with a brush, slowly put down the upper grinding disc 2, lock the pin of the upper grinding disc 2 after the upper grinding disc 2 contacts the outer circle of the part, start the double-end surface grinder to begin grinding, and add grinding liquid every 5 minutes. When the plunger is ground, the upper grinding disc 2 rotates forward, the lower grinding disc 1 rotates backward, and the plunger rolls to grind the outer circle of the plunger, which has good processing effect, and the plunger moves relatively due to the arrangement of the eccentric screw 6, which has good grinding effect.

Claims

1. A plunger double-end-face lapping device characterized by: The utility model relates to a grinding device, including lower grinding disc (1), upper grinding disc (2), eccentric setting in the lower grinding disc (1) with upper grinding disc (2) grinding clamp (3), the grinding clamp (3) middle part is equipped with mounting hole (4), is equipped with multiple groups of even distribution limit slot (5) outside mounting hole (4), lower grinding disc (1) upper end is equipped with eccentric screw (6).

2. A double-sided plug face grinding apparatus according to claim 1, wherein: The lower grinding disc (1) upper end middle part is equipped with recess (7), and the width of the recess (7) outside side and the contact surface of the grinding clamp (3) is greater than the length of the workpiece.

3. A double-sided plug face grinding apparatus as described in claim 1, wherein: The number of the limit slot (5) is 18 groups, the included angle of the plunger axis in the adjacent limit slot (5) is 20 degrees, the distance between the limit slot (5) and the outer edge of the grinding clamp (3) is 1.5-3 millimeters, and the chamfer of the limit slot (5) is not less than 0.5x45 DEG.

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