A high-precision CNC compound grinding machine

Abstract

The present application relates to a high-precision CNC composite grinder, and relates to the technical field of CNC grinders, including a base, on which a clamping device, a grinding device and a detection device are provided, the clamping device including a clamping mechanism and a moving mechanism, the clamping mechanism is used to clamp a workpiece, the moving mechanism is used to drive the clamping mechanism to move, the grinding device is used to perform inner hole grinding on the clamped workpiece, and the detection device is used to detect the inner diameter size of the clamped workpiece. The present application first performs inner hole grinding on the clamped workpiece after detection, and then detects the inner diameter size after grinding, and finally makes the inner hole grinding meet the process requirements by comparing the set values.

Description

Technical Field

[0001] The present application relates to the technical field of CNC grinding machines, and in particular to a high-precision CNC composite grinding machine. Background Art

[0002] CNC grinding machines are machine tools that use abrasive tools to grind the surface of workpieces. Most grinders use high-speed rotating grinding wheels for grinding, while a few use other grinding tools such as oilstones and abrasive belts and free abrasives for processing, such as honing machines, superfinishing machines, belt grinders, grinders and polishers. CNC grinding machines include CNC surface grinders, CNC centerless grinders, CNC internal and external cylindrical grinders, CNC vertical universal grinders, CNC coordinate grinders, CNC forming grinders, etc.

[0003] The Chinese patent application with the publication number CN103962902A discloses an internal cylindrical grinder, which includes a chuck for clamping a workpiece and a grinding head for grinding the workpiece. In use, the workpiece is clamped by the chuck and ground by the grinding head. However, during use, when the cylindrical workpiece (such as a valve sleeve) is clamped by the chuck, the workpiece jumps during processing, resulting in the processed workpiece not meeting the requirements. Summary of the invention

[0004] In view of the deficiencies in the prior art, one of the purposes of the present application is to provide a high-precision CNC compound grinding machine, which has the advantage of being able to detect the runout of a workpiece and reduce the probability that the finished product does not meet the requirements due to the runout of the workpiece.

[0005] The above-mentioned purpose of the present application is achieved through the following technical solutions:

[0006] A high-precision CNC composite grinding machine comprises a base, wherein the base is provided with a clamping device, a grinding device and a detection device, wherein the clamping device comprises a clamping mechanism and a moving mechanism, wherein the clamping mechanism is used for clamping a workpiece, wherein the moving mechanism is used for driving the clamping mechanism to move, wherein the grinding device is used for grinding the inner surface of the clamped workpiece, and wherein the detection device is used for detecting the outer diameter runout and inner diameter size of the clamped workpiece.

[0007] By adopting the above technical solution, during use, the clamped workpiece is detected by the detection device. When the clamped workpiece has a runout exceeding the set value, the workpiece is re-clamped or discarded. Therefore, the probability of deviation from the processing requirements due to the inner and outer diameters of the product being non-concentric after grinding due to the excessive runout during the grinding process can be effectively reduced.

[0008] In a preferred example, the present application can be further configured as follows: the grinding device includes a moving component one, a moving component two, a grinding mechanism one and a grinding mechanism two, the moving component one and the moving component two are arranged side by side and are both installed on a base, the grinding mechanism one is installed on the moving component one and moves toward the workpiece under the action of the moving component one, and the grinding mechanism two is installed on the moving component two and moves toward the workpiece under the action of the moving component two.

[0009] By adopting the above technical solution, during use, the inner circle roughing and finishing of the product are completed through the coordinated use of the grinding mechanism one and the grinding mechanism two.

[0010] In a preferred example, the present application can be further configured as follows: the detection device includes a detection unit 1 and a displacement component 1, the detection unit 1 is installed on the displacement component 1, and the displacement component 1 is used to drive the detection unit 1 to move to the workpiece.

[0011] By adopting the above technical solution, that is, in use, the detection unit 1 is driven to move by the displacement component, which can effectively reduce the probability of causing adverse effects on the detection unit 1 when grinding the workpiece.

[0012] In a preferred example, the present application can be further configured as follows: the detection device also includes a detection unit 2 and a displacement component 2, the detection unit 2 is installed on the displacement component 2, and the detection unit 2 can move toward the workpiece driven by the displacement component 2.

[0013] By adopting the above technical solution, the second detection unit is used to detect the processing effect of the workpiece, thereby effectively improving the qualified rate of the finished product.

[0014] In a preferred example, the present application can be further configured as follows: the displacement component includes a rotating part and a protective shell, the detection unit is installed in the protective shell, the rotating part is used to drive the protective shell to rotate, and the protective shell in a vertical state is located on the moving path of the workpiece.

[0015] By adopting the above technical solution, the presence of the protective shell can effectively reduce the probability of damage to the detection unit 1. At the same time, the presence of the rotating part 1 also enables the detection unit 1 to be better hidden when not in the detection state, further reducing the probability of damage to the detection unit 1.

[0016] In a preferred example, the present application can be further configured as follows: the displacement component 2 includes a shifting member and a rotating member 2, the detection unit 2 is installed on the rotating member 2, the rotating member 2 is installed on the shifting member, and the moving direction of the shifting member is parallel to the moving direction of the moving component 1.

[0017] By adopting the above technical solution, during use, when detecting the processing effect of the workpiece, due to the existence of the rotating part assembly 2 and the shifting part, the processing effect can be comprehensively detected, thereby making the detection effect of the processing effect better.

[0018] In a preferred example, the present application can be further configured as follows: the clamping device also includes a trimming mechanism, and the trimming mechanism is installed on the moving mechanism and is used to trim the grinding device.

[0019] By adopting the above technical solution, during use, since the grinding wheel of the grinding device will be worn after long-term use, the grinding wheel of the grinding device is dressed by the dressing mechanism, thereby ensuring the grinding effect.

[0020] In a preferred example, the present application can be further configured as follows: the trimming mechanism includes a diamond roller and an electric spindle for driving the diamond roller to rotate.

[0021] By adopting the above technical solution, during use, the electric spindle drives the diamond roller to rotate, thereby realizing the dressing of the grinding wheel.

[0022] In a preferred example, the present application can be further configured as follows: it also includes a control system, the control system includes a judgment unit, the detection unit performs multi-point detection on a workpiece, and sends multiple sets of detection data to the judgment unit, the judgment unit performs judgment after receiving the multiple sets of detection data, and if it is different from the standard value, it sends a reloading signal to the clamping device, and the clamping device reloads the workpiece after receiving the reloading signal.

[0023] By adopting the above technical solution, when inspecting the workpiece during use, multiple sets of data are collected through multi-point detection, and the data are judged. When there is a problem with the data, the workpiece is re-clamped, thereby effectively improving the detection accuracy and reducing the probability of qualified workpieces being discarded.

[0024] In a preferred example, the present application can be further configured as follows: if there are X groups of data abnormalities among multiple groups of data, and X is greater than zero and less than the number of groups collected, the judgment unit sends a correction signal to the grinding device, and the grinding device grinds the outer cylindrical surface of the workpiece after receiving the grinding signal.

[0025] By adopting the above technical solution, that is, in use, when the number of occurrences of abnormal data is less than the number of groups collected, the outer cylindrical surface of the workpiece is processed to achieve the purpose of removing the protrusions on the outer cylindrical surface of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of this application.

[0027] Figure 2 It is a schematic diagram of the structure of the detection device of this application.

[0028] Figure 3 This is a schematic diagram of the detection unit 1 and the protective shell structure of the present application.

[0029] Figure numerals: 1. base; 2. clamping device; 21. clamping mechanism; 22. moving mechanism; 23. dressing mechanism; 231. electric spindle; 232. diamond roller; 3. grinding device; 31. moving component one; 32. moving component two; 33. grinding mechanism two; 34. grinding mechanism one; 4. detection device; 41. detection unit one; 42. detection unit two; 43. displacement component one; 431. rotating part one; 432. protective shell; 44. displacement component two; 441. rotating part two. DETAILED DESCRIPTION

[0030] The present application is further described in detail below in conjunction with the accompanying drawings.

[0031] Reference Figure 1-Figure 3 , is a high-precision CNC composite grinding machine disclosed in the present application, comprising a base 1 and a control system, on which a clamping device 2, a grinding device 3 and a detection device 4 are arranged. The clamping device 2 and the grinding device 3 are arranged opposite to each other. The clamping device 2 comprises a clamping mechanism 21, a moving mechanism 22 and a finishing mechanism 23, and the moving mechanism 22 is fixedly mounted on the base 1. In this embodiment, the moving mechanism 22 is composed of a linear guide rail and a ball screw, and the clamping mechanism 21 is a three-jaw chuck for clamping a cylindrical workpiece. In this embodiment, the workpiece is a valve sleeve, which is fixedly mounted on the moving mechanism 22 and is driven to move by the moving mechanism 22.

[0032] The detection device 4 includes a detection unit 1 41, a displacement assembly 1 43, a detection unit 2 42 and a displacement assembly 2 44. The displacement assembly 1 43 includes a moving part, a rotating part 1 431 and a protective shell 432. The moving part is installed in the base 1 and is used to drive the rotating part 1 431 to move. The moving direction of the rotating part 1 431 is perpendicular to the moving direction of the moving mechanism 22. The protective shell 432 is fixedly installed on the rotating part 1 431 and is driven to rotate by the rotating part 1 431. The detection unit 1 41 is fixedly installed in the protective shell 432. In this embodiment, the moving part is a linear module, the rotating part 1 431 is a rotary cylinder, and the detection unit 1 41 is an inductive displacement sensor.

[0033] After the valve sleeve is clamped by the clamping mechanism 21, the moving mechanism 22 drives the clamping mechanism 21 to move, and then drives the valve sleeve to move to the detection unit 41, and the rotating member 431 drives the detection unit 41 to contact the outer circle of the clamped valve sleeve, and then the valve sleeve rotates under the drive of the three-jaw chuck. During the rotation, the moving member drives the rotating member 431 to move along the axial direction of the valve sleeve, so that the detection unit 41 moves along the direction of the valve sleeve to achieve multiple detections. If the valve sleeve jumps or there is a bulge on the outer circle of the valve sleeve, the signal collected by the detection unit 41 will change. Therefore, multiple groups of detection data are formed based on the number of times the detection unit 41 moves along the axial direction of the valve sleeve.

[0034] The control system includes a judgment unit. During the detection process, the detection unit 41 performs multiple detections on the workpiece and sends the detection results to the judgment unit. After receiving multiple sets of detection data, the judgment unit compares the multiple sets of detection data with the standard data. If they are different from the standard data, a reinstallation signal is sent to the clamping device 2. After receiving the reinstallation signal, the clamping device 2 removes the workpiece from the three-jaw chuck through an external pick-and-place device, such as a robot, and re-clamps it, and performs a secondary detection through the detection unit 41.

[0035] That is, after receiving multiple groups of detection data, the judgment unit compares the multiple groups of data with the standard data. If there is an abnormality in X groups of data, that is, X groups of data are different from the standard data, and X is greater than zero and less than the number of groups collected, it indicates that the valve sleeve has a jump or there is a bulge on the outer cylindrical surface of the valve sleeve. Therefore, the valve sleeve is removed from the three-jaw chuck by the pick-and-place device, and is clamped by the three-jaw chuck again, and then a second test is performed by the detection unit 41.

[0036] Among the multiple sets of data detected for the second time, if there are still X sets of data abnormalities, and the other sets are the same as the standard data, and after the workpiece is re-clamped, there are still X sets of data abnormalities, the judgment unit sends a correction signal to the grinding device 3, and the grinding device 3 grinds the outer cylindrical surface of the workpiece after receiving the grinding signal. After the grinding is completed, it is tested again. If it is qualified, it enters the grinding process. If it is unqualified, the workpiece is discarded.

[0037] During the second detection process, if there are still X groups of data anomalies, and the number of data anomalies is the same as that in the first detection, it means that there is a high probability that there are protrusions on the outer surface of the valve sleeve causing the data anomaly, rather than the valve sleeve jumping during the rotation process. Therefore, the grinding device 3 is used to grind the outer cylindrical surface of the valve sleeve to achieve the purpose of trimming the outer cylindrical surface of the valve sleeve. After the grinding is completed, the test is performed again. If there are still data anomalies, the valve sleeve is discarded, thereby reducing the probability of producing defective products.

[0038] The trimming mechanism 23 includes a diamond roller 232 and an electric spindle 231 for driving the diamond roller 232 to rotate. The electric spindle 231 is fixedly mounted on the moving mechanism 22 and is driven to move by the moving mechanism 22 .

[0039] The grinding device 3 includes a moving component 1 31, a moving component 2 32, a grinding mechanism 2 33 and a grinding mechanism 1 34. The moving component 1 31 and the moving component 2 32 are arranged side by side and installed on the base 1. The moving component 1 31 and the moving component 2 32 are both composed of linear guides and ball screws. The grinding mechanism 2 33 is installed on the moving component 1 31 and is driven to move by the moving component 1 31. The grinding mechanism 1 34 is installed on the moving component 2 32 and is driven to move by the moving component 2 32. The moving directions of the moving components 1 31 and 2 32 are parallel and perpendicular to the moving direction of the moving mechanism 22. The grinding mechanism 1 34 and the grinding mechanism 2 33 both include a grinding head and a motor. In order to achieve fine grinding and rough grinding, the grinding wheels of the grinding mechanism 1 34 and the grinding mechanism 2 33 have different particle sizes.

[0040] The displacement component 2 44 includes a shifting member and a rotating member, the shifting member is fixedly mounted on the moving component 1 31, the rotating member 2 441 is fixedly mounted on the shifting member, and the detection unit 2 42 is fixedly mounted on the rotating member 2 441. The moving direction of the rotating member 2 441 is perpendicular to the moving direction of the moving mechanism 22. In this embodiment, the shifting member is a linear module, the rotating member 2 441 is a rotary cylinder, and the detection unit 2 42 is a grinder end face gauge.

[0041] When the clamped valve sleeve does not have any jumping condition, the grinding mechanism 34 grinds the inner hole of the valve sleeve. After the rough grinding is completed, the detection unit 42 detects the inner diameter size of the valve sleeve. If the detection meets the set value, subsequent grinding is performed. If it fails, rough grinding is performed again. After the fine grinding is completed, the detection unit 42 detects the inner diameter size of the valve sleeve. If it passes, material is cut. If it fails, fine grinding is performed again.

[0042] The implementation principle of this embodiment is as follows: during use, the external pick-and-place device moves the workpiece to the three-jaw chuck and is clamped by the three-jaw chuck. Then the moving mechanism 22 drives the three-jaw chuck to move to the detection unit 41. The detection unit detects the workpiece under the drive of the displacement component 43. When the workpiece passes the detection, the grinding mechanism 34 grinds the inner hole of the workpiece. After the rough grinding is completed, the detection unit 42 detects the inner diameter of the workpiece. If the detection meets the set value, subsequent grinding is performed. If it fails, rough grinding is performed again. When fine grinding is completed, the workpiece is finely ground. After completion, the detection unit 2 42 detects the workpiece. If it is qualified, it will be cut into pieces. If it is unqualified, it will be fine-ground again. That is, in the present application, the valve sleeve is tested for vibration through the detection unit 1 41, which greatly reduces the probability of the valve sleeve jumping during the grinding process. After the valve sleeve passes the vibration detection of the detection unit 1 41, the inner hole of the valve sleeve is rough-ground and fine-ground. After rough grinding, it will enter the fine-grinding process. After fine grinding, the inner diameter is tested by the detection unit 2 42. If it meets the requirements, it will be cut into pieces. Therefore, the processed valve sleeve can meet the process requirements.

[0043] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high-precision CNC compound grinding machine, characterized in that: The invention comprises a base (1) and a control system, wherein the base (1) is provided with a clamping device (2), a grinding device (3) and a detection device (4), wherein the clamping device (2) comprises a clamping mechanism (21) and a moving mechanism (22), wherein the clamping mechanism (21) is used to clamp a workpiece, and the moving mechanism (22) is used to drive the clamping mechanism (21) to move, wherein the grinding device (3) is used to grind the workpiece clamped by the clamping device (2), and the detection device (4) is used to detect the clamped workpiece, wherein the detection device (4) comprises a detection unit (41); the control system comprises a judgment unit, wherein the detection unit (41) performs multi-point detection on the vibration of the clamped workpiece and sends multiple groups of detection data to the judgment unit, wherein the judgment unit performs judgment after receiving the multiple groups of detection data, and if there are X groups of data different from the standard value, and X is greater than zero and less than the number of groups collected, then a reload signal is sent to the clamping device (2), and the clamping device ( 2) After receiving the reloading signal, the workpiece is re-clamped, and then the detection unit (41) performs a second detection on the workpiece; if there are still X groups of data that are different from the standard value among the multiple groups of data detected for the second time, and the number of groups of data with abnormalities is the same as that of the first data, the judgment unit sends a correction signal to the grinding device (3), and the grinding device (3) grinds the outer cylindrical surface of the workpiece after receiving the grinding signal; the detection device (4) includes a displacement component (43), the detection unit (41) is installed on the displacement component (43), and the displacement component (43) is used to drive the detection unit (41) to move to the workpiece; the displacement component (43) includes a rotating member (431) and a protective shell (432), the detection unit (41) is installed in the protective shell (432), the rotating member (431) is used to drive the protective shell (432) to rotate, and the protective shell (432) in a vertical state is located on the moving path of the workpiece.

2. A high-precision CNC compound grinding machine according to claim 1, characterized in that: The grinding device (3) comprises a moving component 1 (31), a moving component 2 (32), a grinding mechanism 1 (34) and a grinding mechanism 2 (33); the moving component 1 (31) and the moving component 2 (32) are arranged side by side and are both mounted on a base (1); the grinding mechanism 1 (34) is mounted on the moving component 1 (31) and moves toward a workpiece under the action of the moving component 1 (31); and the grinding mechanism 2 (33) is mounted on the moving component 2 (32) and moves toward the workpiece under the action of the moving component 2 (32).

3. The high-precision CNC compound grinding machine according to claim 1, characterized in that: The detection device (4) further comprises a second detection unit (42) and a second displacement assembly (44), wherein the second detection unit (42) is mounted on the second displacement assembly (44), and the second detection unit (42) can move toward the workpiece under the drive of the second displacement assembly (44).

4. A high-precision CNC compound grinding machine according to claim 3, characterized in that: The displacement component 2 (44) includes a shifting member and a rotating member 2 (441), the detection unit 2 (42) is mounted on the rotating member 2 (441), the rotating member 2 (441) is mounted on the shifting member, and the moving direction of the shifting member is parallel to the moving direction of the moving component 1 (31).

5. The high-precision CNC compound grinding machine according to claim 1, characterized in that: The clamping device (2) further comprises a dressing mechanism (23), wherein the dressing mechanism (23) is mounted on the moving mechanism (22) and is used for dressing the grinding device (3).

6. The high-precision CNC compound grinding machine according to claim 5, characterized in that: The trimming mechanism (23) comprises a diamond roller (232) and an electric spindle (231) for driving the diamond roller (232) to rotate.

Images