Composite grinding machine for machining thin-wall workpiece

Abstract

The utility model belongs to the technical field of grinding machines, and relates to a composite grinding machine for machining thin-wall workpieces, which comprises a grinding machine base, a clamp mechanism is slidably arranged on one side of the grinding machine base, a grinding mechanism is slidably arranged on the other side of the grinding machine base, and the clamp mechanism comprises a clamp seat connected with a spindle and driven by the spindle to rotate. A supporting sleeve is arranged at the front end of the clamp base, a pressing assembly is coaxially arranged outside the clamp base and comprises a front pressing ring, a rear pressing ring and a plurality of connecting rods connected with the front pressing ring and the rear pressing ring, the connecting rods are arranged at intervals, a feeding space of a grinding mechanism is reserved, and the rear pressing ring is driven by a power device to slide in the axial direction. A pressing sleeve is rotationally arranged in the front pressing ring, and after the front pressing ring axially moves along with the rear pressing ring, the pressing sleeve is matched with the supporting sleeve to clamp a workpiece. The composite grinding machine for machining the thin-wall workpiece has the advantages of being simple in structure, convenient to clamp, not prone to deformation and high in machining precision.

Description

Technical Field

[0001] The utility model belongs to the technical field of grinding machines, and relates to a composite grinding machine for processing thin-walled workpieces. Background Technique

[0002] When machining some thin-walled parts (such as oil distribution sleeves), a grinding machine is required to machine multiple parts such as the inner hole and outer circle. Due to the characteristics of thin walls, when using traditional fixtures for clamping, whether it is clamping the outer wall through a jaw-type fixture for fixation or expanding the inner hole through an internal support fixture for fixation, it is easy to cause deformation of the workpiece. In view of this, in order to solve the problem of workpiece deformation, it is necessary to improve the workpiece fixture of the grinding machine.

[0003] Chinese Utility Model Patent CN208409594U (Publication Date: January 22, 2019) discloses a thin-walled fixture for a numerical control grinding machine, which includes a housing. An inner film and an outer film are fixed in the cavity of the housing. The outer circumferential end faces between the inner film and the outer film are spaced apart by a sleeve, and the inner holes of the inner film and the outer film are supported and spaced apart by a push rod sleeve; a support is fixed in the inner hole of the housing, and the end of the support extends into the inner hole of the push rod sleeve; a pushing member is further arranged in the inner hole of the housing, the pushing member can move axially, and the acting end of the pushing member cooperates with the joint surface at the inner end of the inner film and the push rod sleeve; the inner film and the outer film are provided with a plurality of claws arranged in a circumferential shape, and the claws on the inner film pass through the holes formed on the surface of the push rod sleeve.

[0004] The above-mentioned thin-walled fixture reduces the clamping deformation of the specimen by increasing the clamping points, but still cannot solve the problem of deformation of thin-walled workpieces inherent in the jaw-type fixture itself, and also greatly increases the complexity of the fixture. Summary of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the utility model provides a composite grinding machine for processing thin-walled workpieces, which has the advantages of simple structure, convenient clamping, not easy to deform, and high machining accuracy.

[0006] To solve the above technical problems, the purpose of the utility model is achieved through the following technical solutions:

[0007] A composite grinder for processing thin-walled workpieces comprises a grinder base, one side of the grinder base is slidably provided with a clamping mechanism, and the other side of the grinder base is slidably provided with a grinding mechanism, the clamping mechanism comprises a clamping seat connected to a main shaft and driven to rotate by the main shaft, a support sleeve is provided at the front end of the clamping seat, a clamping assembly is coaxially provided outside the clamping seat, the clamping assembly comprises a front pressure ring, a rear pressure ring and a plurality of connecting rods connecting the front and rear pressure rings, the connecting rods are arranged at intervals and leave a feed space for the grinding mechanism, the rear pressure ring is driven by a power device to slide axially, a pressure sleeve is rotatably provided inside the front pressure ring, and after the front pressure ring moves axially thereafter, the pressure sleeve cooperates with the support sleeve to clamp the workpiece.

[0008] In the above-mentioned composite grinding machine for processing thin-walled workpieces, two connecting rods are provided and are respectively located at the upper and lower sides.

[0009] In the above-mentioned composite grinding machine for processing thin-walled workpieces, a bearing is arranged between the front pressure ring and the pressing sleeve; further, the outer ring of the bearing is interference fit with the front pressure ring, and the inner ring is interference fit with the pressing sleeve, the front end of the front pressure ring is provided with a limit ring that abuts against the front end surface of the outer ring of the front bearing, and the rear end of the pressing sleeve is provided with a limit ring that abuts against the rear end surface of the inner ring of the front bearing.

[0010] In the above-mentioned composite grinding machine for processing thin-walled workpieces, the pressing sleeve and the supporting sleeve are respectively provided with centering structures that match the front and rear end surfaces of the workpiece; preferably, the centering structure adopts a centering stop.

[0011] In the above-mentioned composite grinding machine for processing thin-walled workpieces, the support sleeve is detachably connected to the fixture seat, and the pressing sleeve is detachably connected to the front pressing ring.

[0012] In the above-mentioned composite grinding machine for processing thin-walled workpieces, the spindle is an electric spindle, and the power device for driving the rear pressure ring is a cylinder or a motor.

[0013] In the above-mentioned composite grinder for processing thin-walled workpieces, the fixture seat and the support sleeve are provided with interconnected air tightness detection channels, the air tightness detection channels are connected to the air source, and the air outlet of the air tightness detection channel is arranged on the end face of the support sleeve opposite to the workpiece.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. The present utility model provides a composite grinding machine for processing thin-walled workpieces, which improves the fixture mechanism of the grinding machine. By using a support sleeve driven by a main shaft and a pressure sleeve that axially slides, the thin-walled workpiece is fixed by clamping the front and rear ends of the workpiece. Since it does not directly act on the side wall of the workpiece, the deformation of the workpiece caused by traditional fixtures is avoided. At the same time, the support sleeve and the pressure sleeve of the present utility model can center the workpiece simultaneously, ensuring the accuracy of clamping and processing.

[0016] 2. The pressure sleeve of the present utility model transmits the driving force through the connecting rods arranged at intervals, enabling it to axially slide. The connecting rods arranged at intervals can leave a feeding space for the grinding mechanism (such as a grinding wheel). At the same time, when the workpiece rotates with the main shaft, the connecting rods will not rotate therewith. Therefore, when grinding the outer circle, it will not interfere with the grinding mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a perspective view of the present utility model;

[0018] Figure 2 is a perspective view of the fixture mechanism of the present utility model;

[0019] Reference numerals: 10, grinding machine base; 20, fixture mechanism; 30, grinding mechanism; 1, fixture seat; 2, support sleeve; 3, front pressure ring; 4, rear pressure ring; 5, connecting rod; 6, pressure sleeve; 7, workpiece; 8, bearing. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following further describes the present utility model with specific embodiments in conjunction with the drawings, see Figure 1-2 :

[0021] A workpiece fixture of a composite grinding machine includes a grinding machine base 10. A fixture mechanism 20 is slidably arranged on one side of the grinding machine base 10, and a grinding mechanism 30 is slidably arranged on the other side. The fixture mechanism 20 includes a fixture seat 1 connected to the main shaft and driven by the main shaft to rotate. A support sleeve 2 is arranged at the front end of the fixture seat 1. A pressing assembly is coaxially arranged outside the fixture seat 1. The pressing assembly includes a front pressure ring 3, a rear pressure ring 4, and several connecting rods 5 connecting the front and rear pressure rings 4. The connecting rods 5 are arranged at intervals to leave a feeding space for the grinding mechanism. The rear pressure ring 4 is driven by a power device to axially slide. A pressure sleeve 6 is rotatably arranged inside the front pressure ring 3. After the front pressure ring 3 axially moves following the rear pressure ring 4, the pressure sleeve 6 and the support sleeve 2 cooperate to clamp the workpiece 7.

[0022] During operation, the workpiece 7 is moved onto the support sleeve 2 by a manipulator or other means, so that the rear end face of the workpiece 7 abuts against the support sleeve 2. Then, the power device drives the rear pressure ring 4 to move backward (attached Figure 1(in the figure, the initial state), the front pressure ring 3 connected with the rear pressure ring 4 moves backward synchronously, and the pressure sleeve 6 moves backward to press the front end surface of the workpiece 7, completing the clamping of the workpiece 7, and then reset the feeding device. During grinding, the workpiece fixture and the grinding mechanism are fed to the set position, and the spindle drives the fixture seat 1, the support sleeve 2 and the pressure sleeve 6 to rotate synchronously, thereby driving the workpiece 7 to rotate synchronously, while the front pressure ring 3, the rear pressure ring 4 and the connecting rod 5 connected to the pressure sleeve 6 remain stationary; then the fixture mechanism 20 and the grinding mechanism 30 are fed to the processing station, and the grinding mechanism 30 is started to process the parts to be processed in turn.

[0023] In this embodiment, two connecting rods 5 are provided, and are respectively located at the upper and lower sides, and the grinding wheel grinds the outer circle of the workpiece 7 by side feeding.

[0024] In this embodiment, the rotation structure of the front pressure ring 3 and the pressing sleeve 6 is: a bearing 8 is arranged between the front pressure ring 3 and the pressing sleeve 6; the specific installation structure of the bearing 8 is: the outer ring of the bearing 8 is interference fit with the front pressure ring 3, and the inner ring is interference fit with the pressing sleeve 6, the front end of the front pressure ring 3 is provided with a limit ring that contacts the front end surface of the outer ring of the front bearing 8, and the rear end of the pressing sleeve 6 is provided with a limit ring that contacts the rear end surface of the inner ring of the front bearing 8.

[0025] This embodiment can also center the workpiece 7 through the pressing sleeve 6 and the supporting sleeve 2 to ensure its clamping accuracy: the pressing sleeve 6 and the supporting sleeve 2 are respectively provided with centering structures that match the front and rear end surfaces of the workpiece 7; preferably, the centering structure adopts a centering stop.

[0026] In order to adapt to different workpieces 7 , the support sleeve 2 is detachably connected to the fixture seat 1 , and the pressing sleeve 6 is detachably connected to the front pressing ring 3 .

[0027] In this embodiment, the spindle is an electric spindle, and the power device driving the rear pressure ring 4 is a cylinder or a motor.

[0028] This embodiment also provides a clamping detection mechanism for the workpiece 7: a connected air tightness detection channel is provided in the fixture seat 1 and the support sleeve 2, the air tightness detection channel is connected to the air source, and the air outlet of the air tightness detection channel is provided on the end face of the support sleeve 2 opposite to the workpiece 7. When the workpiece 7 is clamped in place, the end face of the workpiece 7 blocks the air outlet, and then the air tightness detection can be used to determine whether the workpiece 7 is clamped in place.

[0029] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A composite grinding machine for processing thin-walled workpieces, comprising a grinding machine base (10), one side of the grinding machine base (10) being slidably provided with a clamping mechanism (20), and the other side of the grinding machine base (10) being slidably provided with a grinding mechanism (30), characterized in that: The clamping mechanism (20) includes a clamping seat (1) connected to the main shaft and driven to rotate by the main shaft, a support sleeve (2) is arranged at the front end of the clamping seat (1), and a clamping assembly is coaxially arranged outside the clamping seat (1), and the clamping assembly includes a front pressure ring (3), a rear pressure ring (4) and a plurality of connecting rods (5) connecting the front and rear pressure rings, and the connecting rods (5) are arranged with gaps and leave a feeding space for the grinding mechanism, and the rear pressure ring (4) is driven by a power device to slide axially, and a pressure sleeve (6) is rotatably arranged inside the front pressure ring (3), and after the front pressure ring (3) and the subsequent pressure ring (4) move axially, the pressure sleeve (6) cooperates with the support sleeve (2) to clamp the workpiece (7).

2. A composite grinding machine for machining thin-walled workpieces according to claim 1, characterized in that: Two connecting rods (5) are provided, and are located at the upper and lower sides respectively.

3. A composite grinding machine for processing thin-walled workpieces according to claim 1, characterized in that: A bearing (8) is provided between the front pressure ring (3) and the pressure sleeve (6).

4. A compound grinding machine for machining thin-walled workpieces according to claim 1, characterized in that: The pressing sleeve (6) and the supporting sleeve (2) are respectively provided with centering structures that match the front and rear end surfaces of the workpiece (7).

5. The compound grinding machine for machining thin-walled workpieces according to claim 1, characterized in that: The support sleeve (2) is detachably connected to the clamp seat (1), and the pressing sleeve (6) is detachably connected to the front pressing ring (3).

6. The compound grinding machine for machining thin-walled workpieces according to claim 1, characterized in that: The fixture seat (1) and the support sleeve (2) are provided with interconnected air tightness detection channels, the air tightness detection channels are connected to an air source, and the air outlet of the air tightness detection channel is provided on the end surface of the support sleeve (2) opposite to the workpiece (7).

Images