Stepped hole inner wall grinding device

Abstract

The utility model relates to the technical field of machining, in particular to a stepped hole inner wall grinding device which comprises a drill chuck, a hard alloy conical rod and a grinding copper sleeve, the drill chuck comprises a three-finger clamping jaw, a chuck body, a sleeve, a shell and a spiral disc, an annular groove is formed in the middle section of the shell, the shell is in threaded connection with the sleeve, and the sleeve is in buckled connection with the spiral disc. The screw disc is in threaded connection with the three-finger clamping jaw, and the screw disc is connected with the chuck body; the middle section of the chuck body is provided with a first convex ring, a second convex ring is arranged at the upper end of the chuck body, the upper end of the screw disc is located at the lower end of the second convex ring, the second convex ring is provided with three holes, the lower end of the chuck body is provided with three channels, the three-finger clamping jaw is placed in the channels, the lower end of the three-finger clamping jaw is provided with an arc-shaped groove, and a groove is formed in the arc-shaped groove. Grooves are formed in the lower end of the grinding copper sleeve, first pressure sensors are arranged in the grooves, three grooves are formed in the lower end of the grinding copper sleeve in a surrounding mode, second pressure sensors are arranged in the three grooves, and by arranging the pressure sensors, the clamping force can be adjusted, and the stability of the machining process is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical processing technical field, especially a kind of device of precision workpiece grinding. BACKGROUND

[0002] With the rapid development of high-end manufacturing, precision machining technology has become the core support in the fields of aerospace, medical devices, optical instruments, semiconductor equipment etc. Among them, high-precision grinding process as the key link of workpiece surface superfinishing, directly affect the functionality, reliability and service life of parts. Hole grinder is limited due to speed.

[0003] The above prior art scheme has the following defects: the inner hole grinding smoothness of the current aperture D1mm or so is insufficient, and the grinding orifice is prone to produce taper. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of stepped hole inner wall grinding device to solve the problems existing in the prior art.

[0005] The above technical purpose of the utility model is realized by the following technical scheme:

[0006] A kind of stepped hole inner wall grinding device, including drill chuck, hard alloy cone stick and grinding copper sleeve, it is characterized by: the drill chuck includes three fingers, chuck body, sleeve, shell and screw disc, the shell middle section is provided with annular groove, the shell is connected with sleeve screw thread, the sleeve and screw disc buckle connection, the screw disc is connected with three fingers screw thread, the screw disc is connected with chuck body, the upper end of the chuck body is provided with threaded hole;

[0007] The first convex ring is arranged in the middle section of the chuck body, a second convex ring is arranged at the upper end of the first convex ring with a certain distance, the second convex ring is arranged at the upper end of the chuck body, the upper end of the screw disc is located at the lower end of the second convex ring, the second convex ring is provided with three through holes which are uniformly distributed around, the center line of the hole gradually decreases from top to bottom, three channels are arranged around the lower end of the chuck body, the channels are located on the same center line as the holes of the second convex ring, the three-fingered clamping claw is arranged around the chuck body, the three-fingered clamping claw is arranged in the channel in an inclined manner, a ball screw thread is arranged on the centrifugal side of the three-fingered clamping claw, a vertical arc-shaped groove is arranged at the lower end of the three-fingered clamping claw, a groove is arranged in the arc-shaped groove, a first pressure sensor is arranged in the groove, a thin tube penetrating the groove is arranged at the upper end of the three-fingered clamping claw, the lower end of the first convex ring is flush with the lower end of the screw disc, the diameter of the chuck body gradually increases downward from the lower end of the first convex ring, the diameter of the chuck body gradually increases downward after the lower end of the chuck body is contracted in the horizontal direction, three grooves are arranged around the lower end of the grinding copper sleeve, a second pressure sensor is arranged in each of the three grooves, and the port at the lower end of the grinding copper sleeve is in the shape of a circular arc.

[0008] By using the first pressure sensor and the second pressure sensor, the value of the pressure sensor is observed, the clamping force of the grinding copper sleeve and the hard alloy cone rod is controlled, the coaxiality of the grinding copper sleeve and the hard alloy cone rod is ensured, the precision of grinding is ensured, and the circular arc shape of the lower end port of the grinding copper sleeve makes the shape of the bottom of the hole standard.

[0009] In further embodiments, the three-fingered clamping claw clamps the grinding copper sleeve, the inner diameter of the grinding copper sleeve gradually decreases from top to bottom, and the upper end of the grinding copper sleeve is in direct contact with the three first pressure sensors.

[0010] In further embodiments, the upper section of the hard alloy cone rod is in direct contact with the three second pressure sensors.

[0011] In further embodiments, the inner diameter of the grinding copper sleeve and the diameter of the hard alloy cone rod are matched through an H5 / g4 gap.

[0012] In further embodiments, the inner wall of the grinding copper sleeve is provided with a wear-resistant layer.

[0013] In further embodiments, the first pressure sensor and the second pressure sensor include a sensitive element, an elastic body, a conversion element, a signal amplifier, and a shell, a display is arranged beside the first pressure sensor, the sensitive element and the elastic body are fixedly attached, the elastic body and the conversion element are fixedly connected, and the conversion element and the signal amplifier are connected through a signal conditioning circuit.

[0014] In summary, the utility model has the following advantages:

[0015] 1. By setting the arc shape at the lower end of the grinding copper sleeve, the bottom shape of the hole can be made to be standardized after grinding;

[0016] 2. By setting the first pressure sensor and the second pressure sensor, the clamping force can be adjusted, the stability of the processing can be ensured, and the grinding pressure can be kept within the optimal range, thus ensuring the accuracy of the ground workpiece. Attached Figure Description

[0017] Figure 1 This is a schematic diagram illustrating the overall structure of the grinding device of this utility model;

[0018] Figure 2 This is a schematic diagram illustrating the drill chuck structure of this utility model;

[0019] Figure 3 This is a schematic diagram illustrating the structure of the clamp body of this utility model;

[0020] Figure 4 This is a schematic diagram illustrating the placement of the second pressure sensor in this invention.

[0021] In the figure, 1 is the drill chuck; 11 is the three-finger gripper; 111 is the first pressure sensor; 12 is the chuck body; 121 is the first convex ring; 122 is the second convex ring; 13 is the sleeve; 14 is the outer shell; 15 is the screw disc; 2 is the carbide cone bar; 3 is the ground copper sleeve; 31 is the second pressure sensor. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings.

[0023] Identical parts are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to the attached figures. Figure 1 In this specification, the terms "bottom surface" and "top surface," "inner" and "outer" refer to the direction toward or away from the geometry of a specific component. 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this specification, "a plurality of" means two or more, unless otherwise explicitly and specifically defined by the direction of the center.

[0024] Example 1:

[0025] like Figures 1-3As shown, a stepped hole inner wall grinding device includes a drill chuck 1, a carbide taper rod 2 and a grinding copper sleeve 3. The drill chuck includes three-fingered clamping jaws 11, a chuck body 12, a sleeve 13, a housing 14 and a screw disc 15. The middle section of the housing 14 is provided with a ring groove. The housing 14 is threadedly connected with the sleeve 13. The sleeve 13 and the screw disc 15 are snap-connected. The screw disc 15 is threadedly connected with the three-fingered clamping jaws 11. The screw disc 15 is connected with the chuck body 12. The upper end of the chuck body 12 is provided with a threaded hole.

[0026] A first convex ring 121 is arranged at the middle section of the chuck body 12. A second convex ring 122 is arranged at the upper end of the chuck body 12 at a distance from the first convex ring 121. The upper end of the screw disc 15 is located at the lower end of the second convex ring 122. The second convex ring 122 is provided with three evenly distributed through holes. The center lines of the holes gradually decrease from top to bottom. Three channels are arranged around the lower end of the chuck body 12. The channels are located on the same center line as the holes of the second convex ring 122. The three-fingered clamping jaws 11 are placed around the chuck body 12. The three-fingered clamping jaws 11 are inclinedly placed in the channels. The three-fingered clamping jaws 11 are provided with ball screw threads on the centrifugal side. The lower end of the three-fingered clamping jaws 11 is provided with a vertical arc-shaped groove. A recess is arranged in the arc-shaped groove. A first pressure sensor 111 is arranged in the recess. A thin tube penetrating the recess is arranged at the upper end of the three-fingered clamping jaws 11. The lower end of the first convex ring 121 is flush with the lower end of the screw disc. The diameter of the chuck body 12 gradually increases downward from the lower end of the first convex ring 121. The lower end of the chuck body 12 is contracted in the horizontal direction, and then the diameter gradually increases downward. Three recesses are arranged around the lower end of the grinding copper sleeve 3. Second pressure sensors 31 are arranged in the three recesses. The port at the lower end of the grinding copper sleeve 3 is in the shape of a circular arc.

[0027] The three-fingered clamping jaws 11 clamp the grinding copper sleeve 3. The inner diameter of the grinding copper sleeve 3 gradually decreases from top to bottom. The upper end of the grinding copper sleeve 3 directly contacts the three first pressure sensors 111. The upper section of the carbide taper rod 2 directly contacts the three second pressure sensors 31. The inner diameter of the grinding copper sleeve 3 and the diameter of the carbide taper rod 2 are matched by an H5 / g4 gap. The inner wall of the grinding copper sleeve 3 is provided with a wear-resistant layer.

[0028] The first pressure sensor 111 and the second pressure sensor 31 include a sensitive element, an elastic body, a conversion element, a signal amplifier and a housing. A display is arranged beside the first pressure sensor 111. The sensitive element and the elastic body are fixedly attached. The elastic body and the conversion element are fixedly connected. The conversion element and the signal amplifier are connected through a signal conditioning circuit.

[0029] Specific implementation process: the chuck body 12 is provided with the first convex ring 121 and the second convex ring 122, the movement of the screw disc 15 is limited, the screw disc 15 is rotated, the three-fingered clamping jaw 11 is moved upwards, the three-fingered clamping jaw 11 is opened, the upper section of the grinding copper sleeve 3 is placed in the middle of the three fingers of the three-fingered clamping jaw 11, the screw disc 15 is reversely rotated, the three-fingered clamping jaw 11 is moved downwards, the grinding copper sleeve 3 is tightened, the upper section of the hard alloy cone rod 2 is placed in the lower section inside the grinding copper sleeve 3, the display is observed, the first pressure sensor 111 and the second pressure sensor 31 are maintained in the normal range, the grinding paste is added in the workpiece hole, when the drill chuck 1 rotates, the grinding copper sleeve 3 and the hard alloy cone rod 2 are driven to rotate together, the middle end of the hard alloy cone rod 2 is placed in the workpiece hole, the hand guard is worn, the workpiece is gripped tightly, the hard alloy cone rod 2 is manually pushed, the axial slight movement is made, the grinding copper sleeve 3 and the hole wall are slid to grind.

[0030] In the embodiments disclosed in the present application, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense. For example, "connecting" can be fixed connection, detachable connection or integral connection; "connecting" can be direct connection or indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the embodiments disclosed in the present application can be understood according to the specific circumstances.

[0031] The specific embodiments are only an explanation of the present application, and are not a limitation of the present application. Those skilled in the art can make modifications to the embodiments without creative contribution after reading the present application, as long as the modifications are within the scope of the claims of the present application.

Claims

1. A stepped hole inner wall grinding device, comprising a drill chuck (1), a carbide cone rod (2) and a grinding copper sleeve (3), characterized in that: The drill chuck comprises three-fingered clamping jaw (11), chuck body (12), sleeve (13), shell (14) and screw disc (15), the middle section of the shell (14) is provided with ring groove, the shell (14) is threadedly connected with sleeve (13), the sleeve (13) and screw disc (15) are buckled, the screw disc (15) is threadedly connected with three-fingered clamping jaw (11), the screw disc (15) is connected with chuck body (12), and the upper end of the chuck body (12) is provided with threaded hole. The middle section of the chuck body (12) is provided with first convex ring (121), the upper end of the first convex ring (121) is provided with second convex ring (122) at a distance, the second convex ring (122) is arranged at the upper end of the chuck body (12), the upper end of the screw disc (15) is located at the lower end of the second convex ring (122), the second convex ring (122) is provided with three evenly distributed through holes, the center line of the hole gradually decreases from top to bottom with the center line of the chuck body (12), the lower end of the chuck body (12) is provided with three channels, the channels are located on the same center line as the holes of the second convex ring (122), the three-fingered clamping jaw (11) is placed around the chuck body (12), the three-fingered clamping jaw (11) is placed obliquely in the channel, the centrifugal side of the three-fingered clamping jaw (11) is provided with ball screw thread, the lower end of the three-fingered clamping jaw (11) is provided with a vertical arc-shaped groove, the arc-shaped groove is provided with a groove, the groove is provided with a first pressure sensor (111), the upper end of the three-fingered clamping jaw (11) is provided with a thin tube penetrating the groove, the lower end of the first convex ring (121) is flush with the lower end of the screw disc, the diameter of the chuck body (12) gradually increases from the lower end of the first convex ring (121) to the lower end of the chuck body (12), after the lower end of the chuck body (12) is contracted in the horizontal direction, the diameter of the lower end of the chuck body (12) gradually increases downward, the lower end of the grinding copper sleeve (3) is provided with three grooves, and the three grooves are provided with second pressure sensors (31), and the port of the lower end of the grinding copper sleeve (3) is in the shape of a circular arc.

2. A stepped bore inner wall lapping device according to claim 1, wherein: The three-fingered clamping jaw (11) clamps the grinding copper sleeve (3), the inner diameter of the grinding copper sleeve (3) gradually decreases from top to bottom, and the upper end of the grinding copper sleeve (3) directly contacts the three first pressure sensors (111).

3. The stepped bore inner wall lapping device of claim 1 wherein: The upper end of the hard alloy cone rod (2) directly contacts the three second pressure sensors (31).

4. The stepped bore inner wall lapping device of claim 1 wherein: The inner diameter of the grinding copper sleeve (3) and the diameter of the hard alloy cone rod (2) are matched by H5 / g4 gap.

5. The stepped bore inner wall lapping device of claim 1 wherein: The inner wall of the grinding copper sleeve (3) is provided with a wear-resistant layer.

6. The stepped bore inner wall lapping device of claim 1 wherein: The first pressure sensor (111) and the second pressure sensor (31) comprise a sensitive element, an elastic body, a conversion element, a signal amplifier and a shell, a display is arranged beside the first pressure sensor (111), the sensitive element and the elastic body are fixedly pasted, the elastic body and the conversion element are fixedly connected, and the conversion element and the signal amplifier are connected through a signal conditioning circuit.

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