Efficient and stable relief grinding machine

Abstract

The utility model discloses an efficient and stable relief grinding machine which comprises a working table, a cam shaft installation base capable of moving front and back and a cradle installed in a hinged mode are installed on the working table, a cam shaft is installed on the cam shaft installation base, a power mechanism is installed at one end of the cam shaft installation base, and a conjugate cam is installed in the middle of the cam shaft. A rocker arm is synchronously installed on the conjugate cam, the tail end of the rocker arm is connected with the cradle, and a clamping device used for positioning and clamping a workpiece is installed on the cradle. By arranging the rocker arm and the conjugate cam, the center distance between the center of the cam and the center of the hinge can be changed according to the lever principle, then the relief grinding amount is adjusted, closed-loop control over the reciprocating motion of relief grinding is achieved through the conjugate cam structure, and the stability of the relief grinding amount and the relief grinding precision are fully guaranteed. Due to the fact that the cradle is light in weight and provided with a spring damper, high relief grinding frequency can be achieved, and production efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing equipment, in particular to a highly efficient and stable relief grinder. Background Art

[0002] Currently, there are two main methods for relief grinding: mechanical cam relief grinding and linear motor relief grinding (i.e., electronic cam). Traditional mechanical cam relief grinding uses a cam feed and spring return method. This method offers high relief precision but low frequency, which does not meet current requirements for efficient machining. Linear motor relief grinding has become a popular relief grinding method due to its simple mechanical structure and easy adjustment of the relief amount. However, it is significantly affected by the control system and load, and is prone to lost steps during high-speed relief grinding. Utility Model Content

[0003] In view of the above defects or shortcomings, the purpose of the present invention is to provide an efficient and stable relief grinder.

[0004] In order to achieve the above objectives, the technical solution of the utility model is:

[0005] A highly efficient and stable relief grinder comprises: a workbench, on which is mounted a camshaft mounting seat which can move forward and backward and a hinged cradle, a camshaft being mounted on the camshaft mounting seat, a power mechanism being mounted on one end, and a conjugate cam being mounted on the middle part of the camshaft; a rocker arm being synchronously mounted on the conjugate cam, the end of the rocker arm being connected to the cradle, and a clamping device for positioning and clamping a workpiece being mounted on the cradle.

[0006] A double V-shaped closed guide rail is installed at the bottom of the workbench.

[0007] A dovetail-shaped slide groove is provided at the bottom of the camshaft mounting seat, and a slide rail matching the dovetail-shaped slide groove is provided on the workbench.

[0008] An adjusting handle for pushing the camshaft mounting seat to move is installed on the camshaft mounting seat.

[0009] The adjusting handle is connected to the camshaft mounting seat through a threaded connection, and the other end of the adjusting handle is hingedly mounted on a workbench. Rotating the adjusting handle drives the camshaft mounting seat to move back and forth in the dovetail-shaped slide groove.

[0010] The power mechanism includes a servo motor, the output end of the servo motor is connected to one end of the camshaft through an elastic coupling, and the other end of the camshaft is installed on the workbench through an auxiliary support.

[0011] The auxiliary support includes: an upper slide installed at the end of the camshaft, a self-aligning ball bearing installed between the upper slide and the camshaft, and the flange cover fixedly installed at the end of the upper slide; a lower slide is slidably installed on the bottom of the upper slide through a dovetail guide rail, and a guide key is provided between the lower slide and the workbench to assist in guiding the movement of the lower slide.

[0012] The conjugate cam is provided with an upper and lower cam roller. The rocker arm is connected to the cam roller via an eccentric shaft and is in contact with the conjugate cam at the same time.

[0013] A remote lever is mounted on the rocker arm. The remote lever is movably connected to the rocker frame and is released and locked by a locking mechanism.

[0014] Spring dampers for absorbing impact vibration are installed at both ends of the cradle.

[0015] The beneficial effects of the utility model are:

[0016] This utility model provides a highly efficient and stable relief grinding machine. By providing a rocker arm and conjugate cam, the distance between the cam center and the hinge center can be changed through the principle of leverage, thereby adjusting the amount of relief grinding. The reciprocating motion of the relief grinding is controlled in a closed loop by the conjugate cam structure, fully ensuring the stability of the relief grinding amount and the relief grinding accuracy. The lightweight rocker and spring damping enable a high relief grinding frequency, greatly improving production efficiency.

[0017] Furthermore, the worktable is supported and guided by double V-shaped closed guideways, offering excellent support rigidity, guidance, high precision, and strong impact resistance. Conjugate cam relief grinding, with both feed and return strokes precisely controlled by the cam profile, offers excellent stability and high precision. Through precise design and optimization of the cam profile, efficient relief grinding can be achieved for a variety of relief types and amounts.

[0018] Furthermore, the auxiliary support structure of the present invention fully considers the rigidity of the camshaft and the convenience of cam replacement, thereby enhancing the flexibility of the relief grinding mechanism. The damping structures on both sides of the cradle can effectively mitigate the impact caused by the relief grinding process, reduce the load on the cam, and facilitate the high-speed operation of the cam. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a three-dimensional structural diagram of the efficient and stable relief grinder of the utility model;

[0020] Figure 2 This is a schematic diagram of the camshaft structure of the efficient and stable relief grinder of the utility model;

[0021] Figure 3 for Figure 2 Schematic diagram of the cross-section structure along AA;

[0022] Figure 4 for Figure 3 Schematic diagram of the cross-section structure along BB;

[0023] Figure 5 Schematic diagram of the camshaft position adjustment structure.

[0024] In the figure, 1-workbench; 2-servo motor; 3-camshaft mounting seat; 4-elastic coupling; 5-camshaft; 6-conjugate cam; 7-spring damper; 8-adjusting handle; 9-eccentric shaft; 10-rocker arm; 11-correction rod; 12-locking mechanism; 13-cradle; 14-workpiece center; 15-hinge; 16-cam roller; 17-guide key; 18-lower slide; 19-upper slide; 20-self-aligning ball bearing; 21-flange cover; 22-locking pressure block; 1-1-double V-type closed guide rail; 3-1 dovetail guide rail; 10-1-remote lever. DETAILED DESCRIPTION

[0025] The present invention will be described in detail below with reference to the accompanying drawings. It is apparent that the embodiments described are only a portion of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0026] like Figure 1-4 As shown, the utility model provides an efficient and stable scraper grinder, comprising: a workbench 1, on which is mounted a camshaft mounting seat 3 that can move forward and backward and a hinged cradle 13, a camshaft 5 mounted on the camshaft mounting seat 3, a power mechanism mounted on one end of the camshaft 5, a conjugate cam 6 mounted in the middle of the camshaft 5; a rocker arm 10 is synchronously mounted on the conjugate cam 6, the end of the rocker arm 10 is connected to the cradle 13, and a clamping device for positioning and clamping the workpiece is mounted on the cradle 13. The conjugate cam 6 profile is composed of an Archimedean spiral and a fifth-order polynomial curve corrected by sinusoidal acceleration at both ends, and the camshaft 5 and the conjugate cam 6 are positioned and transmitted with a tapered hole and a double cylindrical pin. This structure enables zero-clearance fit, precise positioning, reliable torque transmission, and convenient disassembly and replacement of the cam.

[0027] Specifically, the bottom of the workbench 1 is equipped with a double V-shaped closed guide rail 1-1, the bottom of the camshaft mounting seat 3 is provided with a dovetail-shaped slide groove 3-1, and the workbench 1 is provided with a slide rail that matches the dovetail-shaped slide groove 3-1. In the present invention, the double V-shaped closed guide rail 1-1 is used for support and guidance. The workbench is equipped with a camshaft mounting seat 3 and a cradle 13. The camshaft mounting seat 3 is connected to the workbench by the dovetail guide rail 3-1. The distance between the center of the conjugate cam 6 and the center of the cradle 13 can be adjusted. The cradle 13 is hinged to the workbench 1 and swings back and forth to simulate a grinding motion. Specifically, the cradle 13 and the camshaft mounting seat 3 are hingedly connected by a hinge 15.

[0028] Preferably, Figure 5 As shown, the camshaft mounting base 3 is mounted with an adjustment handle 8 for moving the camshaft mounting base 3. The adjustment handle 8 is threadedly connected to the camshaft mounting base 3, and the other end of the adjustment handle 8 is hingedly mounted on the workbench 1. Rotating the adjustment handle 8 drives the camshaft mounting base 3 back and forth within the dovetail-shaped slot 3-1. Rotating the adjustment handle 8 moves the camshaft 5 back and forth to adjust the amount of relief. After adjustment, the locking mechanism 12 is re-tightened and the calibration rod 11 is removed.

[0029] It should be noted that the power mechanism includes a servo motor 2 , the output end of the servo motor 2 is connected to one end of the camshaft 5 via an elastic coupling 4 , and the other end of the camshaft 5 is mounted on the workbench 1 via an auxiliary support.

[0030] Specifically, the auxiliary support includes: an upper slide 19 and a lower slide 18. The upper slide 19 is installed at the end of the camshaft 5. A self-aligning ball bearing 20 is installed between the upper slide 19 and the camshaft 5. The flange cover 20 is fixedly installed at the end of the upper slide 19; the lower slide 18 is slidably installed on the bottom of the upper slide 19 through a dovetail guide rail, and a guide key 17 for assisting the movement and guiding of the lower slide 18 is provided between the lower slide 18 and the workbench 1. The guide key 17 is used to assist in supporting the movement and guiding of the lower slide 18 to ensure that its moving direction is consistent with the camshaft mounting seat 3.

[0031] The rocker arm 10 is mounted with a rocker arm 10-1, which is movably connected to the cradle 13 and can be released and locked by a locking mechanism 12. The rocker arm 10-1 is connected to the cradle 13 via a movable pair and can be released and locked by the locking mechanism 12. For example, the locking mechanisms 12 are arranged on both sides and consist of two upper and lower brake blocks that mate with the cylindrical surface of the rocker arm 10-1. A correction rod 11 is mounted on the rocker arm 10-1, which can be moved simultaneously with the camshaft mounting base 3. The correction rod 11 is a locating pin that aligns the locating holes of the camshaft mounting base 3 with the locating holes of the cradle 13, serving as an auxiliary tool for aligning the cam position and adjusting the center distance.

[0032] The other end of the camshaft 5 has an auxiliary support including a lower slide 18, an upper slide 19, and a self-aligning ball bearing 20, which is used to increase the rigidity of the camshaft. In order to absorb impact vibration, spring dampers 7 are installed at both ends of the cradle. The conjugate cam 6 is provided with an upper and lower cam roller 16, and the rocker arm 10 is connected to the cam roller 16 through an eccentric shaft 9, and is in contact with the conjugate cam 6 at the same time. For example, in the present invention, the conjugate cam 6 is installed on the camshaft 5, and two cam rollers 16 are provided 180 degrees above and below the conjugate cam 6. The upper and lower cam rollers 16 are installed on the rocker arm 10 with an eccentric shaft 9, and are in contact with the conjugate cam 6 at the same time. The stepped eccentric shaft 9 is used to adjust the initial position of the cradle and correct its contact position with the cam to eliminate the contact gap.

[0033] Spring dampers 7 for absorbing impact vibration are installed at both ends of the cradle 13 .

[0034] In the present invention, the workbench 1 adopts a double V-shaped closed guide rail 1-1, the camshaft mounting seat 3 is connected to the workbench in a dovetail manner, the servo motor 2 and the camshaft 5 are directly connected through an elastic coupling 4, and the auxiliary support end is composed of a slide 18 guided by a key 17, a dovetail-guided slide 19 and a self-aligning ball bearing 20. The conjugate cam 6 and the camshaft are positioned by a tapered hole, and the upper and lower cam rollers 16 of the cam are in contact with the two surfaces of the conjugate cam 6 respectively. The cam roller 16 is connected to the rocker arm 10 with a stepped eccentric shaft, and the rocker arm 10 is movably connected to the rocker frame 13 and is equipped with a locking device 12. The rocker frame is hinged at both ends of the workbench 1, and spring dampers 7 are configured at both ends. The center position 14 of the workpiece is used for positioning and clamping the workpiece. For example, a shock-absorbing spring with a guide shaft is provided on the spring damper 7, which can play a buffering role when the rocker frame 13 moves downward.

[0035] The working process of this utility model is as follows:

[0036] During the relief grinding process: the servo motor 2 is directly connected to the camshaft 5 through the coupling 4 and drives the conjugate 6 to rotate. The two cam rollers 9 at one end of the rocker arm 10 are pressed tightly against the conjugate cam 6, and the other end is connected to the cradle 13. As the cam rotates, the rocker arm 10 and the cradle 13 swing back and forth, that is, the center position 14 of the workpiece swings back and forth to complete the relief grinding movement. The rocker arm 10 and the cradle 13 swing back and forth, and the workpiece installed between the two centers at position 14 makes feed and retract movements relative to the grinding wheel, thereby completing the relief grinding process on the workpiece.

[0037] When the amount of relief grinding needs to be adjusted: use the correction rod 11 to position the rocker arm 10 and the camshaft mounting seat 3, loosen the locking mechanism 12, turn the adjustment handle 8, move the camshaft back and forth to change the amount of relief grinding. After the adjustment is completed, re-lock the locking mechanism and remove the correction rod.

[0038] When the cam needs to be replaced: loosen the upper and lower slide seats 18 and 19, lock the pressure block 22, open the flange cover 21, loosen the self-aligning ball bearing 20, slide the upper slide seat and the bearing out together, and then use special tools to remove the original cam and replace it with a new cam.

[0039] For those skilled in the art, it is obvious that the above-mentioned specific examples are only preferred embodiments of the present invention. Therefore, any improvements and changes that may be made by those skilled in the art to certain parts of the present invention still reflect the principles of the present invention and still achieve the purpose of the present invention, and all fall within the scope of protection of the present invention.

Claims

1. An efficient and stable relief grinder, characterized in that: include: A workbench (1) is provided, wherein a camshaft mounting seat (3) movable forward and backward and a hinged cradle (13) are installed on the workbench (1); a camshaft (5) is installed on the camshaft mounting seat (3); a power mechanism is installed at one end; a conjugate cam (6) is installed in the middle of the camshaft (5); a rocker arm (10) is synchronously installed on the conjugate cam (6); the end of the rocker arm (10) is connected to the cradle (13); and a clamping device for positioning and clamping a workpiece is installed on the cradle (13).

2. The efficient and stable relief grinder according to claim 1, characterized in that: A double V-shaped closed guide rail (1-1) is installed at the bottom of the workbench (1).

3. The efficient and stable relief grinder according to claim 1, characterized in that: A dovetail-shaped slide groove (3-1) is provided at the bottom of the camshaft mounting seat (3), and a slide rail matching the dovetail-shaped slide groove (3-1) is provided on the workbench (1).

4. The efficient and stable relief grinder according to claim 3, characterized in that: An adjusting handle (8) for pushing the camshaft mounting seat (3) to move is installed on the camshaft mounting seat (3).

5. The efficient and stable relief grinder according to claim 4, characterized in that: The adjusting handle (8) is connected to the camshaft mounting seat (3) through a threaded connection, and the other end of the adjusting handle (8) is hingedly mounted on the workbench (1). Rotating the adjusting handle (8) drives the camshaft mounting seat (3) to move back and forth in the dovetail-shaped slide groove (3-1).

6. The efficient and stable relief grinder according to claim 1, characterized in that: The power mechanism comprises a servo motor (2), the output end of the servo motor (2) is connected to one end of the camshaft (5) via an elastic coupling (4), and the other end of the camshaft (5) is mounted on the workbench (1) via an auxiliary support.

7. The efficient and stable relief grinder according to claim 5, characterized in that: The auxiliary support comprises: an upper slide (19) mounted on the end of the camshaft (5), a self-aligning ball bearing (20) mounted between the upper slide (19) and the camshaft (5), and the flange cover (20) fixedly mounted on the end of the upper slide (19); a lower slide (18) is slidably mounted on the bottom of the upper slide (19) through a dovetail guide rail, and a guide key (17) for assisting the lower slide (18) in moving and guiding is provided between the lower slide (18) and the workbench (1).

8. The efficient and stable relief grinder according to claim 1, characterized in that: The conjugate cam (6) is provided with an upper and lower cam roller (16), and the rocker arm (10) is connected to the cam roller (16) through an eccentric shaft (9) and is in contact with the conjugate cam (6) at the same time.

9. The efficient and stable relief grinder according to claim 7, characterized in that: A remote lever (10-1) is mounted on the rocker arm (10). The remote lever (10-1) is movably connected to the rocker frame (13) and is loosened and locked by a locking mechanism (12).

10. The efficient and stable relief grinder according to claim 1, characterized in that: Spring dampers (7) for absorbing impact vibration are installed at both ends of the cradle (13).

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