Grinding machine for metal workpiece

Abstract

The grinding machine for the metal workpiece comprises a machine body, a three-jaw chuck is connected to the position of a main shaft of the machine body, a linear guide rail is connected to the top of the machine body, and a tool base is connected to the top of the linear guide rail; a grinding mechanism is arranged at the top of the tool base, supporting mechanisms are arranged at the positions, located on the two sides of the grinding mechanism, of the top of the tool base, a shaft workpiece is inserted into supporting rings in a penetrating mode, then one end of the shaft workpiece is clamped through a three-jaw chuck, and the supporting rings are arranged on the two sides of a machining part of the grinding mechanism for supporting; the supporting ring coaxial with the three-jaw chuck can well support the shaft workpieces, so that when some long shaft workpieces are machined, the problem that the grinding depths of the surfaces of the workpieces are inconsistent due to the fact that the shaft workpieces deform and bend due to the fact that a supporting point is far away from the machining position can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of metal workpiece processing, and in particular to a grinding machine for metal workpieces. Background Art

[0002] CNC grinding machines are machine tools that use grinding tools to grind the surface of workpieces through CNC technology. Most grinding machines 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 prior art, such as publication number "CN216098107U", provides a CNC grinder for processing metal workpieces, which belongs to the technical field of CNC grinders. The key points of its technical solution include a grinder body, a rotating disk is rotatably arranged on the grinder body, and also includes a fixed seat, a fixed assembly and a top. The fixed seat is rotatably arranged on the rotating disk, and a plug-in slot is arranged on the fixed seat. The fixed assembly is arranged on the tip of the top. The top is plug-in arranged in the plug-in slot and is detachably fixed to the fixed seat through the fixed assembly. The fixed assembly includes a first spring and a fixed rod. A placement slot is arranged on the side wall of the top along its axis. The first spring is arranged in the placement slot. One end of the first spring away from the placement slot is connected to the fixed rod. A fixing hole is arranged on the fixed seat, and the fixing hole is connected to the plug-in slot. The fixing rod is snap-fitted and embedded in the fixing hole under the action of the corresponding spring. The present application has the effect of facilitating the staff to replace the top on the grinder.

[0004] However, the prior art has the following problems:

[0005] In this solution, the end of the shaft part is fixed by pressing the top point against it. However, in actual processing, when some shaft parts are long, they are fixed by supporting them at both ends of the shaft. It is easy for the unsupported part of the part to bend during processing, resulting in inconsistent surface grinding depth, especially when grinding the part in the middle of the shaft, which is more likely to bend because it is far away from the support point. Summary of the invention

[0006] The purpose of the present invention is to provide a grinding machine for metal workpieces in order to solve the above problems and overcome the defects of the prior art, as described in detail below.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A grinding machine for metal workpieces provided by the present invention includes a machine body. A three-jaw chuck is connected to the position of the main shaft of the machine body. A linear guide rail is connected to the top of the machine body, and a tool holder is connected to the top of the linear guide rail.

[0009] A grinding mechanism is arranged on the top of the tool holder for grinding workpieces.

[0010] Support mechanisms are arranged on the top of the tool holder at positions on both sides of the grinding mechanism for supporting workpieces.

[0011] Among them, the grinding mechanism includes a support plate. The support plates are respectively connected to the positions on both sides of the grinding mechanism at the top of the tool holder, and support rings are connected to the tops of the support plates.

[0012] Preferably, the support ring is composed of an outer ring, an inner ring, support blocks, guide wheels, hinge frames, first chutes, and first sliding columns. The inner ring is arranged inside the outer ring. The support blocks are connected to the inner wall of the outer ring, distributed in a 120-degree annular array, and the support blocks are connected to the outer wall of the inner ring.

[0013] Preferably, the hinge frames are hinged on the inner ring, distributed in a 120-degree annular array. The guide wheels are respectively rotatably connected to one ends of the hinge frames inside the inner ring. The first sliding columns are connected to the outer ring, distributed in a 120-degree annular array, and the first sliding columns are slidably connected to the first chutes opened on the inner walls of the hinge frames.

[0014] Preferably, a tightening rod is connected to the bottom of the outer ring. A second chute is opened on the inner wall of the tightening rod. A second sliding column is slidably connected to the inner wall of the second chute. One end of the second sliding column is connected to a first threaded block. A tightening groove is opened on the support plate, and the inner wall of the tightening groove is slidably connected to the first threaded block.

[0015] Preferably, a first screw rod is rotatably connected to the inner wall of the tightening groove. A first knob for rotating the first screw rod is arranged on one side of the support plate. The first screw rod is threadedly connected to the first threaded block.

[0016] Preferably, the grinding mechanism includes a support frame. A through groove is opened on the top of the support frame. A pressing rod is slidably connected to the inner wall of the through groove. A spherical grinding tool is connected to the bottom of the pressing rod.

[0017] Preferably, an adjustment groove is opened on one side of the support frame. A second screw rod is rotatably connected to the inner wall of the adjustment groove. A second threaded block is threaded on the outer wall of the second screw rod, and the second threaded block is slidably connected to the inner wall of the adjustment groove. A second knob for rotating the second screw rod is arranged above the adjustment groove. The second threaded block is connected to one side of the pressing rod through a connecting rod.

[0018] Preferably, the bottom height of the adjustment groove is the same as the height of the central axis of the three-jaw chuck, the bottom of the spherical grinding tool is at the same height as the bottom of the second threaded block, and a scale line is provided on one side outside the adjustment groove.

[0019] Preferably, a tailstock is slidably connected to the position of the linear guide rail at the tail of the fuselage, and a center drill is connected to the inner wall of the tailstock.

[0020] The beneficial effects are as follows:

[0021] First, in the present invention, the shaft workpiece is inserted into the support ring, and then one end of the shaft workpiece is clamped by the three-jaw chuck, so as to facilitate the rotation of the shaft workpiece in the three-jaw chuck driven by the main shaft, so as to facilitate grinding the shaft workpiece by the grinding mechanism. By arranging the support ring on both sides of the processing part of the grinding mechanism for support, the support ring coaxial with the three-jaw chuck can provide good support for the shaft workpiece, so that when processing some shaft workpieces with longer lengths, it is possible to avoid the situation that the shaft workpiece is deformed and bent due to the long distance between the support points and the processing position, resulting in inconsistent grinding depth on the surface of the workpiece.

[0022] Second, in the present invention, relative limit is carried out through the connection relationship between the first threaded block and the tightening groove, so that when the first screw rotates, it can drive the first threaded block to perform linear motion in the left-right direction. The second sliding column is used to push the tightening rod to drive the inner ring to rotate. The opened second sliding groove can ensure that the second sliding column has sufficient displacement space inside the tightening rod. When the inner ring rotates, due to the relative position change between the outer ring and the inner ring, the articulated frame is pushed by the first sliding column, so that the included angle between the articulated frame and the inner ring changes, so that the guide wheels in the articulated frame move closer to or spread from the center position of the inner ring, so as to facilitate the support of shaft workpieces with different diameters. Moreover, the rolling mode of the guide wheels as the support at the contact position can avoid damage to the surface of the rotating workpiece at the support position.

[0023] Third, in the present invention, relative limit is carried out through the connection relationship between the second threaded block and the adjustment groove, so that when the second screw rotates, it can drive the second threaded block to perform linear motion in the up-down direction, so as to facilitate adjusting the grinding depth of the spherical grinding tool under the pressing rod. And because the bottom of the spherical grinding tool is at the same height as the bottom of the second threaded block, when adjusting the grinding depth, the scale line can be referred to, and the value on the scale line is the distance between the spherical grinding tool and the axis center line of the shaft workpiece, so as to facilitate adjusting the grinding depth. Description of the Drawings

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 is the overall external structure display diagram of the present invention;

[0026] Figure 2 is the structural display diagram of the support mechanism in the present invention;

[0027] Figure 3 is the structural display diagram of the support ring in the present invention;

[0028] Figure 4 is in the present invention Figure 2 Enlarged view of part A;

[0029] Figure 5 is the structural display diagram of the grinding mechanism in the present invention;

[0030] Figure 6 is in the present invention Figure 5 Enlarged view of part B;

[0031] Figure 7 is the structural display diagram of the tailstock in the present invention.

[0032] Explanation of reference numerals is as follows: 1, fuselage; 11, linear guide rail; 12, three-jaw chuck; 2, tailstock; 21, center; 3, tool holder; 4, support mechanism; 41, support plate; 42, support ring; 421, outer ring; 422, inner ring; 423, support block; 424, guide wheel; 425, articulated frame; 426, first chute; 427, first sliding column; 44, tightening rod; 441, tightening groove; 442, first screw rod; 443, first knob; 444, first threaded block; 445, second sliding column; 446, second chute; 5, grinding mechanism; 51, support frame; 52, through groove; 53, pressing rod; 54, spherical grinding tool; 55, adjustment groove; 551, scale line; 56, second screw rod; 57, second threaded block; 58, second knob; 59, connecting rod. Detailed implementation manners

[0033] To make the objectives, technical solutions and advantages of the present invention clearer, the following will describe the technical solutions of the present invention in detail. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other implementation manners obtained by those of ordinary skill in the art without creative efforts fall within the scope protected by the present invention.

[0034] Example 1

[0035] Refer to Figure 1 and Figure 2 As shown, a grinding machine for metal workpieces includes a machine body 1. A three-jaw chuck 12 is connected to the position of the main shaft of the machine body 1. A linear guide rail 11 is connected to the top of the machine body 1. A tool holder 3 is connected to the top of the linear guide rail 11. A grinding mechanism 5 is arranged on the top of the tool holder 3 for grinding workpieces. Support mechanisms 4 are arranged on both sides of the grinding mechanism 5 at the top of the tool holder 3 for supporting workpieces. Among them, the grinding mechanism 5 includes support plates 41. The support plates 41 are respectively connected to both sides of the grinding mechanism 5 at the top of the tool holder 3. Support rings 42 are connected to the tops of the support plates 41.

[0036] Furthermore, insert the shaft workpiece into the inside of the support ring 42, and then clamp one end of the shaft workpiece through the three-jaw chuck 12, so as to facilitate driving the shaft workpiece in the three-jaw chuck 12 to rotate through the main shaft, so as to facilitate grinding it through the grinding mechanism 5. By arranging the support ring 42 on both sides of the processing part of the grinding mechanism 5 for support, the support ring 42 coaxial with the three-jaw chuck 12 can provide good support for the shaft workpiece, so that when processing some shaft workpieces with longer lengths, it is possible to avoid the situation that the shaft workpiece is deformed and bent due to the support point being far from the processing position, resulting in the problem of inconsistent grinding depth on the surface of the workpiece.

[0037] Example 2

[0038] Refer to Figure 2 and Figure 3 and Figure 4As shown, on the basis of Embodiment 1, preferably, the support ring 42 is composed of an outer ring 421, an inner ring 422, support blocks 423, guide wheels 424, hinge frames 425, first chutes 426, and first sliding columns 427. The inner ring 422 is disposed inside the outer ring 421. The support blocks 423 are connected to the inner wall of the outer ring 421 and are distributed in a 120-degree annular array, and the support blocks 423 are connected to the outer wall of the inner ring 422. By arranging the support blocks 423 between the outer ring 421 and the inner ring 422, the outer ring 421 and the inner ring 422 can rotate while maintaining the distance between them. The hinge frames 425 are hinged to the inner ring 422 and are distributed in a 120-degree annular array. The guide wheels 424 are respectively rotatably connected to one end of the hinge frames 425 inside the inner ring 422. The first sliding columns 427 are connected to the outer ring 421 and are distributed in a 120-degree annular array. The first chutes 426 are slidably connected to the first chutes 426 opened on the inner wall of the hinge frames 425. The opened first chutes 426 can ensure that the first chutes 426 have sufficient displacement space on the inner wall of the hinge frames 425. The bottom of the outer ring 421 is connected to a tension rod 44. The inner wall of the tension rod 44 is provided with a second chute 446. The inner wall of the second chute 446 is slidably connected to a second sliding column 445. One end of the second sliding column 445 is connected to a first threaded block 444. A tension groove 441 is opened on the support plate 41, and the inner wall of the tension groove 441 is slidably connected to the first threaded block 444. The opened second chute 446 can ensure that the second sliding column 445 has sufficient displacement space on the inner wall of the tension rod 44. The inner wall of the tension groove 441 is rotatably connected to a first screw rod 442. A first knob 443 for rotating the first screw rod 442 is disposed on one side of the support plate 41. The first screw rod 442 is threadedly connected to the first threaded block 444. Due to the relative limit of the connection relationship between the first threaded block 444 and the tension groove 441, when the first screw rod 442 rotates, it can drive the first threaded block 444 to perform a linear motion in the left-right direction.

[0039] Furthermore, by rotating the first knob 443 to drive the first screw rod 442, relative limit is carried out through the connection relationship between the first threaded block 444 and the tightening slot 441, so that when the first screw rod 442 rotates, it can drive the first threaded block 444 to perform a linear motion in the left-right direction. The tightening rod 44 is pushed by the second sliding column 445 to drive the inner ring 422 to rotate. The opened second sliding slot 446 can ensure that the second sliding column 445 has sufficient displacement space inside the inner wall of the tightening rod 44. When the inner ring 422 rotates, due to the relative position change between the outer ring 421 and the inner ring 422, the articulated frame 425 is pushed by the first sliding column 427, so that the included angle between the articulated frame 425 and the inner ring 422 changes, and the guide wheel 424 in the articulated frame 425 moves closer to or spreads out from the center position of the inner ring 422, so as to facilitate the support of shaft workpieces with different diameters. Moreover, the rolling mode of the guide wheel 424 is used as the support at the contact position, which can avoid damaging the surface of the rotating workpiece at the support position, and the self-locking of the thread of the first screw rod 442 can also ensure the stability of the support.

[0040] Embodiment 3

[0041] See Figure 5 、 Figure 6 As shown in [relevant figure], on the basis of Embodiment 1, preferably, the grinding mechanism 5 includes a support frame 51. A through slot 52 is opened at the top of the support frame 51. A pressing rod 53 is slidably connected to the inner wall of the through slot 52. A spherical grinding tool 54 is connected to the bottom of the pressing rod 53. Here, the spherical grinding tool 54 can be replaced with other types of grinding tools. By the way of the pressing rod 53 sliding up and down in the through slot 52, it is convenient to perform grinding with different depths, and the stability of the spherical grinding tool 54 can be ensured during grinding. An adjustment slot 55 is opened on one side of the support frame 51. A second screw rod 56 is rotatably connected to the inner wall of the adjustment slot 55. A second threaded block 57 is threaded on the outer wall of the second screw rod 56, and the second threaded block 57 is slidably connected to the inner wall of the adjustment slot 55. A second knob 58 for rotating the second screw rod 56 is arranged above the adjustment slot 55. The second threaded block 57 is connected to one side of the pressing rod 53 through a connecting rod 59. The bottom height of the adjustment slot 55 is the same as the height of the central axis of the three-jaw chuck 12. The bottom height of the spherical grinding tool 54 is the same as the bottom height of the second threaded block 57. A scale line 551 is arranged on one side outside the adjustment slot 55.

[0042] Furthermore, by sliding the pressing rod 53 up and down in the through slot 52, it is convenient to perform grinding at different depths, and the stability of the spherical grinding tool 54 can be ensured during grinding. By rotating the second knob 58 to drive the rotation of the second screw rod 56, relative limitation is carried out through the connection relationship between the second threaded block 57 and the adjustment slot 55, so that when the second screw rod 56 rotates, it can drive the second threaded block 57 to perform a linear motion in the up and down direction, to conveniently adjust the grinding depth of the spherical grinding tool 54 below the pressing rod 53. And since the bottom of the spherical grinding tool 54 is at the same height as the bottom of the second threaded block 57, when adjusting the grinding depth, the scale line 551 can be referred to, and the value on the scale line 551 is the distance between the spherical grinding tool 54 and the axis center line of the shaft workpiece.

[0043] Embodiment 4

[0044] See Figure 7 As shown, on the basis of Embodiment 1, preferably, the tailstock 2 is slidably connected to the position of the linear guide rail 11 at the tail of the fuselage 1, and a center drill 21 is connected to the inner wall of the tailstock 2.

[0045] Furthermore, the center drill 21 on the tailstock 2 is abutted against the center hole at the other end of the shaft workpiece to facilitate support.

[0046] Working principle

[0047] During use, insert the shaft workpiece through the inside of the support ring 42, then clamp one end of the shaft workpiece with the three-jaw chuck 12, and press the center punch 21 on the tailstock 2 against the center hole at the other end of the shaft workpiece to facilitate full support. Drive the shaft workpiece inside the three-jaw chuck 12 to rotate through the main shaft, so as to facilitate grinding it with the grinding mechanism 5. Support by arranging the support ring 42 on both sides of the processing part of the grinding mechanism 5. The support ring 42 coaxial with the three-jaw chuck 12 can provide good support for the shaft workpiece, so that when processing some shaft workpieces with longer lengths, the situation of deformation and bending of the shaft workpiece caused by the support point being far from the processing position can be avoided. During actual use, drive the first screw rod 442 by rotating the first knob 443. Carry out relative limit through the connection relationship between the first threaded block 444 and the tightening groove 441, so that when the first screw rod 442 rotates, it can drive the first threaded block 444 to perform a linear motion in the left-right direction. Drive the second sliding column 445 through the first threaded block 444 to push the tightening rod 44 to connect the inner ring 422 to rotate. When the inner ring 422 rotates, due to the relative position change between the outer ring 421 and the inner ring 422, the articulated frame 425 is pushed by the first sliding column 427, so that the included angle between the articulated frame 425 and the inner ring 422 changes, so that the guide wheel 424 in the articulated frame 425 moves closer to or spreads out from the center position of the inner ring 422, so as to facilitate supporting shaft workpieces with different diameters. Moreover, the rolling mode of the guide wheel 424 is used as the support at the contact position, which can avoid damaging the surface of the rotating workpiece at the support position. And the self-locking of the thread of the first screw rod 442 can also ensure the stability of the support. When grinding, press down the rod 53 to slide up and down in the through groove 52, so as to facilitate grinding with different depths, and the stability of the spherical grinding tool 54 can be ensured during grinding. During specific operation, drive the second screw rod 56 to rotate by rotating the second knob 58. Carry out relative limit through the connection relationship between the second threaded block 57 and the adjustment groove 55, so that when the second screw rod 56 rotates, it can drive the second threaded block 57 to perform a linear motion in the up-down direction, so as to facilitate adjusting the grinding depth of the spherical grinding tool 54 below the pressing rod 53. And because the bottom of the spherical grinding tool 54 is at the same height as the bottom of the second threaded block 57, when adjusting the grinding depth, the scale line 551 can be referred to. The value on the scale line 551 is the distance between the spherical grinding tool 54 and the axis center line of the shaft workpiece, so as to facilitate adjustment.

[0048] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A grinding machine for metal workpieces, characterized in that, It includes a fuselage (1), a three-jaw chuck (12) is connected to the position of the main axis of the fuselage (1), a linear guide (11) is connected to the top of the fuselage (1), and a tool holder (3) is connected to the top of the linear guide (11); A grinding mechanism (5) is arranged on the top of the tool holder (3) for grinding workpieces; Support mechanisms (4) are arranged on both sides of the grinding mechanism (5) at the top of the tool holder (3) for supporting workpieces; Among them, the grinding mechanism (5) includes a support plate (41), and the support plates (41) are respectively connected to both sides of the grinding mechanism (5) at the top of the tool holder (3), and support rings (42) are connected to the tops of the support plates (41).

2. The grinding machine for metal workpieces according to claim 1, wherein: The support ring (42) is composed of an outer ring (421), an inner ring (422), support blocks (423), guide wheels (424), hinge frames (425), a first chute (426), and a first sliding column (427). The inner ring (422) is arranged inside the outer ring (421). The support blocks (423) are connected to the inner wall of the outer ring (421) and are distributed in a 120-degree circular array, and the support blocks (423) are connected to the outer wall of the inner ring (422).

3. The grinder for metal workpieces according to claim 2, characterized in that: The hinge frames (425) are hinged to the inner ring (422) and are distributed in a 120-degree circular array. The guide wheels (424) are respectively rotatably connected to one end of the hinge frames (425) inside the inner ring (422). The first sliding columns (427) are connected to the outer ring (421) and are distributed in a 120-degree circular array. The first sliding columns (427) are slidably connected to the first chute (426) opened on the inner wall of the hinge frames (425).

4. The grinding machine for metal workpieces according to claim 3, characterized in that: The bottom of the outer ring (421) is connected with a tightening rod (44). A second chute (446) is opened on the inner wall of the tightening rod (44). A second sliding column (445) is slidably connected to the inner wall of the second chute (446). One end of the second sliding column (445) is connected with a first threaded block (444). A tightening groove (441) is opened on the support plate (41), and the inner wall of the tightening groove (441) is slidably connected with the first threaded block (444).

5. The grinder for metal workpieces according to claim 4, characterized in that: A first screw rod (442) is rotatably connected to the inner wall of the tightening groove (441). A first knob (443) for rotating the first screw rod (442) is arranged on one side of the support plate (41). The first screw rod (442) is threadedly connected with the first threaded block (444).

6. The grinder for metal workpieces according to claim 1, characterized in that: The grinding mechanism (5) includes a support frame (51). A through groove (52) is opened on the top of the support frame (51). A pressing rod (53) is slidably connected to the inner wall of the through groove (52). A spherical grinding tool (54) is connected to the bottom of the pressing rod (53).

7. The grinding machine for metal workpieces according to claim 6, wherein: One side of the support frame (51) is provided with an adjustment groove (55). The inner wall of the adjustment groove (55) is rotatably connected to a second screw rod (56). A second threaded block (57) is threaded on the outer wall of the second screw rod (56), and the second threaded block (57) is slidably connected to the inner wall of the adjustment groove (55). Above the adjustment groove (55), a second knob (58) for rotating the second screw rod (56) is provided. The second threaded block (57) is connected to one side of the pressing rod (53) through a connecting rod (59).

8. The grinder for metal workpieces according to claim 7, characterized in that: The height of the bottom of the adjustment groove (55) is the same as the height of the central axis of the three-jaw chuck (12). The height of the bottom of the spherical grinding tool (54) is the same as the height of the bottom of the second threaded block (57). A scale line (551) is provided on one side outside the adjustment groove (55).

9. The grinder for metal workpieces according to claim 1, characterized in that: The tailstock (2) is slidably connected to the position of the linear guide (11) at the tail of the fuselage (1). A center drill (21) is connected to the inner wall of the tailstock (2).

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