CN218017475U - A self-aligning device for grinding surface coating of piston rod - Google Patents

Abstract

The utility model discloses a centering device used for grinding the surface coating of a piston rod, which belongs to the technical field of piston rod grinding and comprises: two centering components arranged oppositely and at intervals. The centering component includes a connecting shaft, an adjusting Mandrel and some adjusting parts; one end of the connecting shaft forms a fixed end for detachable coaxial insertion with the end of the piston rod, and the other end of the connecting shaft is coaxially provided with adjusting holes; several adjusting parts are connected with several connecting holes A corresponding and movable plug-in, to extend to the depth of the adjustment hole by adjusting each adjustment piece, to form an adjustable centering area between the adjustment ends of several adjustment pieces extending into the adjustment hole; one end of the self-aligning mandrel and the adjustment The hole gap fits and can be clamped in the centering area; the utility model realizes the adjustment of the center of rotation of the piston rod grinding by adding a centering device, which is convenient to use, and is especially suitable for the grinding process after the coating is prepared on the surface of the piston rod.

Description

A self-aligning device for grinding surface coating of piston rod

technical field

The utility model relates to the technical field of piston rod grinding, in particular to a centering device used for grinding the surface coating of a piston rod.

Background technique

The piston rod is generally a connecting part that supports the piston to do work. It is mainly used in oil cylinders and cylinder motion actuators. It is a moving part with frequent movements and high technical requirements. In order to improve the performance of the piston rod, its surface is generally thermally sprayed or plated with a metal or ceramic coating with excellent wear resistance and corrosion resistance.

In order to ensure dimensional accuracy and surface roughness, the coating surface needs to be ground. The publication number is CN201832994U, which provides a lathe for processing plate rollers. The cylindrical grinding process of shaft parts is based on the center hole or tapered surface at both ends of the part as the center of rotation, and the two tops on the headstock and tailstock of the grinding machine are clamped. After the workpiece is finished, the part is rotated through the lever protruding from the dial of the head frame to realize the cylindrical grinding process.

During the coating preparation process of the piston rod, due to transfer, coating adhesion and other reasons, the center hole or cone surface will often be damaged to a certain extent. Therefore, the center hole or cone surface needs to be reprocessed before cylindrical grinding. At present, there are mainly the following problems: 1. Increased equipment requirements and processes; 2. The surface of the coating is rough, and it is difficult to correct the center hole based on this; 3. Remachining the center hole will damage the parts to a certain extent. Therefore, it is of great practical value to use an external centering device to adjust the center of gyration.

Utility model content

The purpose of this utility model is to overcome the above-mentioned technical deficiencies, and propose a centering device for the grinding process of the surface coating of the piston rod, which can realize the adjustment of the center of rotation of the shaft parts before the grinding process, and reduce the use of machining methods to repair parts Process for center hole or taper.

In order to achieve the above technical purpose, the technical solution of the utility model provides a centering device for grinding the surface coating of the piston rod, including:

Two self-aligning components are arranged oppositely and at intervals, the opposite ends of the two self-aligning components are respectively used to insert the opposite ends of the piston rod, and the other ends of the two self-aligning components are used to abut against the grinding processing equipment respectively The two mounting ends are used for the two mounting ends to drive the two self-aligning components to rotate;

The self-aligning components include connecting shafts, self-aligning mandrels and several adjustment parts;

One end of the connecting shaft forms a fixed end for detachable coaxial insertion with the end of the piston rod, the other end of the connecting shaft is coaxially provided with an adjustment hole, and the outer peripheral surface of the connection shaft corresponding to the adjustment hole is evenly provided with several adjustment holes. Connecting holes connected by holes;

A number of adjustment pieces correspond to a number of connecting holes one by one and are movably plugged in so as to extend to the depth of the adjustment holes by adjusting each adjustment piece, so that a number of adjustment pieces extend into the adjustment holes to form an adjustable centering area between the adjustment ends ;

One end of the self-aligning mandrel fits with the adjustment hole and can be clamped in the self-aligning area, and the other end of the self-aligning mandrel protrudes from the adjustment hole and forms a clamping surface for abutting against the installation end.

In some embodiments, the adjusting member preferably adopts bolts, and there are four adjusting members.

In some embodiments, the end surface of the nut of the adjustment member is provided with an angle scale, and the tooth shape of the adjustment member is a fine thread.

In some embodiments, a locking nut is threadedly connected to the outer surface of the adjusting member, the side of the locking nut close to the connecting shaft is rough, and a nylon ring is embedded inside the locking nut.

In some embodiments, the cross-sectional area of the middle part of the connecting shaft is larger than the cross-sectional area of the fixed end.

In some embodiments, the outer side of the middle part of the connecting shaft is an outer hexagonal structure.

In some embodiments, the outer diameter of the self-aligning mandrel is 1-1.5 mm smaller than the diameter of the adjusting hole.

In some embodiments, the fixed end is a cylinder with external threads on its outer peripheral surface.

In some embodiments, the outer circular surface of the self-aligning mandrel disposed at one end of the adjustment hole is provided with a sandblasting coating.

In some embodiments, one end of the clamping surface of the self-aligning mandrel is provided with a central hole.

Compared with the prior art, the beneficial effects of the utility model include: through the provided connecting shaft, self-aligning mandrel and adjusting piece, one end of the connecting shaft can be coaxially assembled and fixed with the parts, and the radial direction of the connecting shaft is arranged The connecting hole is used for installing the adjustment piece, and the position of the self-aligning mandrel in the adjustment hole is adjusted through the adjustment piece, so as to realize the adjustment of the center of rotation of the piston rod before the cylindrical grinding process. The utility model realizes the adjustment of the center of rotation of the piston rod through an external device, without trimming the original center hole or cone surface of the workpiece, and is convenient to use, and is especially suitable for the cylindrical grinding process after the coating is prepared on the surface of the piston rod.

Description of drawings

Fig. 1 is a front view sectional structure diagram of the centering assembly of an embodiment of the centering device used in the grinding process of the surface coating of the piston rod of the utility model;

Fig. 2 is a schematic diagram of the front view of the centering assembly of an embodiment of the centering device used in the grinding process of the surface coating of the piston rod of the present invention;

Fig. 3 is a schematic view of the front view of the centering assembly of an embodiment of the centering device for grinding the surface coating of the piston rod according to the present invention.

In the figure: 1, connecting shaft; 11, fixed end; 12, adjusting hole; 13, connecting hole; 2, self-aligning mandrel; 21, clamping surface; 22, center hole; 3, adjusting piece; 31, locking Nut; 32, scale ruler; 4, top.

detailed description

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

As shown in Figure 1, the utility model provides a centering device for grinding the surface coating of the piston rod, including:

Two self-aligning components are arranged oppositely and at intervals, the opposite ends of the two self-aligning components are respectively used to insert the opposite ends of the piston rod, and the other ends of the two self-aligning components are used to abut against the grinding processing equipment respectively The two mounting ends are used for the two mounting ends to drive the two self-aligning components to rotate.

The self-aligning assembly includes a connecting shaft 1, a self-aligning mandrel 2 and several adjusting parts 3.

One end of the connecting shaft 1 forms a fixed end 11 for detachable coaxial insertion with the end of the piston rod. The other end of the connecting shaft 1 is coaxially provided with an adjusting hole 12, and the outer peripheral surface of the connecting shaft 1 corresponding to the adjusting hole 12 is evenly opened. There are several connection holes 13 all communicating with the adjustment holes 12 .

Several adjustment parts 3 correspond to several connecting holes 13 one by one and are movably plugged in, so as to extend the depth of each adjustment part 3 to the adjustment hole 12 for several adjustment parts 3 to extend to the adjustment ends in the adjustment hole 12 to form a position Adjustable centering area.

One end of the self-aligning mandrel 2 is in clearance fit with the adjustment hole 12 and can be clamped in the centering area. The other end of the self-alignment mandrel 2 protrudes from the adjustment hole 12 and forms a clamping surface 21 for abutting against the installation end.

In this device, the feature of the piston rod to be processed is that both ends are provided with an inner groove that can cooperate with the fixed end 11, and the inner groove is coaxial with the piston rod. When in use, the fixed ends 11 of the two connecting shafts 1 are respectively connected to the In the inner grooves at both ends of the piston rod, it is coaxially fixed with the piston rod. One end of the self-aligning mandrel 2 is connected to the connecting shaft 1 through the adjustment hole 12, and the other end of the self-aligning assembly and the opposite end are used for abutting grinding respectively. The two installation ends of the processing equipment, that is, the other end of the self-aligning mandrel 2 can be connected with the installation end of the grinding machine, so that the two ends of the piston rod can be fixed by using the centering device, and finally, the connecting shaft 1 is connected by multiple The adjusting part 3, by adjusting the depth of the adjusting part 3 extending to the adjusting hole 12, the adjustment of the centering area can be realized, and the relative position of the connecting shaft 1 and the self-aligning mandrel 2 can be adjusted, so that the center of rotation of the part to be processed can be realized adjustment.

Further, there are two mounting ends of the grinding machine. When in use, both ends of the piston rod are connected to the centering device, and the two mounting ends can press the clamping surface 21 tightly respectively, so that the centering of the two ends of the piston rod can be utilized. The device clamps the piston rod.

As shown in FIG. 1 , in some embodiments, the cross-sectional area of the middle part of the connecting shaft 1 is larger than the cross-sectional area of the fixed end 11. By setting the cross-sectional area of the middle part of the connecting shaft 1 larger than the cross-sectional area of the fixed end 11, When the connecting shaft 1 is matched with the inner groove of the piston rod, after the connecting shaft 1 extends to a certain distance, the piston rod will reach the middle of the connecting shaft 1, thereby realizing the fixing of the lateral position of the piston rod.

Further, the outer diameter of the self-aligning mandrel 2 is 1-1.5mm smaller than the diameter of the regulating hole 12, and the relative movable space between the self-aligning mandrel 2 and the regulating hole 12 is small, which is convenient for fixing the self-aligning mandrel 2 with the adjusting part 3, In order to facilitate the fine adjustment of the center of rotation of the parts to be processed.

Further, the outer circular surface of the self-aligning mandrel 2 located at one end of the adjustment hole 12 is provided with a sandblasting coating, and the outer circular surface of the self-aligning mandrel 2 is subjected to sandblasting to increase the size of the self-aligning mandrel 2 and the adjusting member. The frictional force between 3 ensures the stability before and after adjusting the self-aligning mandrel 2.

As shown in Figure 1 and Figure 2, in some embodiments, bolts are preferred for the adjustment member 3, and four adjustment members 3 are provided. Specifically, when the adjustment member 3 uses bolts, the connecting hole 13 is a threaded hole, and the four adjustment members The parts 3 are respectively arranged in four directions outside the connecting shaft 1 and are screwed with the connecting hole 13. When in use, firstly, the adjusting parts 3 on the upper and lower sides of the connecting shaft 1 are rotated, and the screwed-in distance of the two adjusting parts 3 is used to control the The upper and lower positions of the self-aligning mandrel 2, and then turn the adjustment parts 3 on the left and right sides of the connecting shaft 1, and use the distance between the two adjustment parts 3 to control the left and right positions of the self-aligning mandrel 2. The mandrel 2 is connected and fixed with the grinding machine. When the center of one end of the piston rod needs to be adjusted upward, adjust the self-aligning mandrel 2 downward. The rod 2 is adjusted to the right, and vice versa, to realize the adjustment of the center of rotation of the piston rod before the cylindrical grinding process.

Further, the adjusting part 3 can also adopt a block or a block, and by adjusting the block or block to adjust the position of the self-aligning mandrel 2 and fixing the block or block, the adjustment of the center of rotation of the part to be processed can be realized

Further, the end face of the nut of the adjusting part 3 is provided with an angle scale scale 32, and the profile of the adjusting part 3 is a fine thread. By setting the profile of the adjusting part 3 as a fine thread, the adjustment to the centering core when the adjusting part 3 is screwed in can be reduced. The adjustment amount of the rod 2 is to improve the adjustment accuracy. By setting the angle scale scale 32, in the present embodiment, when the adjustment member 3 rotates a circle (ie 360°), the adjustment member 3 advances by 1mm, and then the half rotation is 0.5mm , a quarter of a turn is 0.25mm, and so on, so that the angle of rotation of the adjustment member 3 can be obtained by using the angle scale scale 32, so as to control the adjustment amount, and the control accuracy is high.

Further, a lock nut 31 is threadedly connected to the outer surface of the adjustment member 3, and the side of the lock nut 31 close to the connecting shaft 1 is rough, and the inside of the lock nut 31 is embedded with a nylon ring. Specifically, the outer circumference of the connecting shaft 1 is connected to the There is a plane at the position corresponding to the hole 13. When the lock nut 31 is tightened, the rough surface of the lock nut 31 is in contact with the plane of the connecting shaft 1, and the lock nut 31 is screwed to the adjustment member 3 and the nylon ring is pressed tightly. , can increase the friction area and friction force when the adjustment member 3 is connected.

Further, one end of the clamping surface 21 of the self-aligning mandrel 2 is provided with a central hole 22. Specifically, the mounting end of the grinding machine is provided with a top 4, and the central hole 22 is used to connect with the top 4, so as to quickly use the centering The device realizes the centering fixation of the piston rod.

As shown in Figure 2, in some embodiments, the fixed end 11 is a cylinder with external threads on the outer peripheral surface, so that the piston rod to be processed is characterized by internal thread grooves on both sides, and the fixed end 11 can be connected with the internal thread grooves. The thread fits to realize the coaxial fixation of the piston rod.

Further, the outer side of the middle part of the connecting shaft 1 is an outer hexagonal structure. By setting the outer side of the middle part of the connecting shaft 1 as an outer hexagonal structure, when connecting the connecting shaft 1 with the internal thread groove of the piston rod, it is convenient for the staff to use the tool clip Hold the outer hexagonal part to tighten the connecting shaft 1.

As shown in FIG. 3 , further, the fixed end 11 can also be a polygonal cylinder capable of fitting and clampingly fitting with the inner groove of the piston rod, so as to realize coaxial fixing of the piston rod.

Further, the connecting shaft 1, the self-aligning mandrel 2, the adjusting member 3 and the locking nut 31 are made of stainless steel or medium carbon steel.

Working principle: first connect the connecting shaft 1 with the internal thread groove of the piston rod to be processed, use tools to clamp the outer hexagonal part and tighten the connecting shaft 1, and then install the self-aligning mandrel 2 into the adjustment hole 12 of the connecting shaft 1 In this method, after both sides of the piston rod are installed in this way, the parts are clamped on the cylindrical grinding machine. The clamping method is to use the top 4 of the grinding machine to clamp the center hole 22 of the self-aligning mandrel 2, and then the lock nut 31 and the adjustment After the parts 3 are combined, put them into the four connecting holes 13 in the radial direction of the adjustment hole 12, use the dial indicator to correct the runout of the outer circle reference position of the piston rod, and realize the adjustment of the center of rotation of the parts by rotating the four adjustment parts 3, After the calibration of the piston rod is completed, tighten the lock nut 31 to prevent the loosening of the adjusting part 3 .

The utility model is provided with the connecting shaft 1, the self-aligning mandrel 2 and the adjusting part 3. One end of the connecting shaft 1 can be coaxially assembled and fixed with the parts, and the connecting hole 13 provided in the radial direction of the connecting shaft 1 is used for installation and adjustment. Part 3, adjust the position of the self-aligning mandrel 2 in the adjustment hole 12 through the adjusting part 3, so as to realize the adjustment of the center of rotation of the piston rod before the cylindrical grinding process. The utility model realizes the adjustment of the center of rotation of the piston rod through an external device, without trimming the original center hole 22 or the cone surface of the workpiece, and is convenient to use, especially suitable for cylindrical grinding after the surface of the piston rod is coated.

The specific embodiments of the utility model described above do not constitute a limitation to the protection scope of the utility model. Any other corresponding changes and deformations made according to the technical concept of the utility model shall be included in the protection scope of the claims of the utility model.

Claims (10)

1. A self-aligning device for grinding the surface coating of a piston rod, characterized in that it comprises: Two self-aligning assemblies opposite and arranged at intervals, the opposite ends of the two self-aligning assemblies are respectively used to insert the opposite ends of the piston rod, and the other ends of the two self-aligning assemblies are used to respectively abut against the opposite ends Grinding the two mounting ends of the processing equipment, so that the two mounting ends can drive the two self-aligning components to rotate; The self-aligning assembly includes a connecting shaft, a self-aligning mandrel and several adjustment pieces; One end of the connecting shaft forms a fixed end for detachable coaxial insertion with the end of the piston rod, the other end of the connecting shaft is coaxially provided with an adjusting hole, and the outer peripheral surface of the connecting shaft corresponding to the adjusting hole is evenly provided with several Each connecting hole communicates with the regulating hole; Several of the adjusting parts correspond to the connecting holes one by one and are movably plugged in, so as to extend the depth of each adjusting part to the adjusting hole, so as to form an adjustable position between the adjusting ends of several of the adjusting parts extending into the adjusting hole centering area; One end of the self-aligning mandrel is in clearance fit with the adjustment hole and can be clamped in the self-aligning area; the other end of the self-aligning mandrel protrudes from the adjustment hole and forms a hole for abutting the end clamping surface. 2 . The centering device used for grinding the surface coating of the piston rod according to claim 1 , wherein the adjusting member preferably adopts bolts, and there are four adjusting members. 3 . 3. A centering device for grinding the surface coating of the piston rod according to claim 2, characterized in that, the end face of the nut of the adjustment member is provided with an angle scale scale, and the tooth shape of the adjustment member is a fine tooth . 4. A centering device for grinding the surface coating of the piston rod according to claim 2, characterized in that, the outer surface of the adjustment member is threaded with a lock nut, and the lock nut is close to the connection One side of the shaft is a rough surface, and a nylon ring is embedded inside the locking nut. 5 . The centering device for grinding the surface coating of the piston rod according to claim 1 , wherein the cross-sectional area of the middle part of the connecting shaft is larger than the cross-sectional area of the fixed end. 6 . The centering device for grinding the surface coating of the piston rod according to claim 1 , wherein the outer side of the middle part of the connecting shaft is an outer hexagonal structure. 7 . 7 . The centering device for grinding the surface coating of the piston rod according to claim 1 , wherein the outer diameter of the self-aligning mandrel is 1-1.5 mm smaller than the diameter of the adjusting hole. 8 . The centering device for grinding the surface coating of the piston rod according to claim 1 , wherein the fixed end is a cylinder with an external thread on its outer peripheral surface. 9 . 9. A centering device for grinding the surface coating of the piston rod according to claim 1, wherein the self-aligning mandrel is provided with a nozzle on the outer surface of one end of the adjustment hole. Sand coating. 10 . The centering device for grinding the surface coating of the piston rod according to claim 1 , wherein a center hole is provided at one end of the clamping surface of the self-aligning mandrel. 11 .

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