Fine adjustment device for flat grinding of grinding tool

Abstract

The invention relates to a fine adjustment device for flat grinding of a grinding tool. The fine adjustment device solves the technical problems that in existing local repair welding repair, when a numerical control machining center is adopted for grinding, cost is high, and precision is insufficient during manual grinding. The device comprises a base, a stand column, a transverse rod, a lifting screw handle and a transverse rod clamping handle. The stand column is detachably connected to the base and fixed through a stand column locking screw. A rectangular groove and a lifting screw connected with a lifting screw handle are arranged in the middle of the stand column. One end of the cross rod slidably sleeves the upright post and the lifting screw rod through the square groove to form a thread pair, and the other end of the cross rod is used for mounting a grinding tool and is fixed through a grinding tool locking screw; a stand column locking seam penetrating through the transverse rod is formed in the transverse rod, and clamping through holes are formed in the two sides of the stand column locking seam. And the cross rod clamping handle is arranged in the clamping through hole.

Description

Technical Field

[0001] The present invention relates to a grinding auxiliary tooling, and particularly to a fine-tuning device for surface grinding of a grinding tool. Background Art

[0002] For local damage or structural modification and repair of a mold, a method combining repair welding and surface finishing is usually adopted. First, local repair welding treatment is carried out, and then the plane accuracy is restored through surface finishing (such as grinding). According to different accuracy requirements, the operations in actual production are also different.

[0003] When the processing accuracy requirement is small, manual hand-held grinding equipment is generally used for operation. The operator completes grinding and polishing processing with the help of a grinding tool. This method has low equipment investment and flexible operation, but is restricted by the manual skill level, and it is difficult to guarantee the grinding accuracy.

[0004] When the processing accuracy requirement is high, numerical control machining centers or precision surface grinders are generally used for processing. This method has high processing accuracy, but due to the high value of numerical control machining centers or precision surface grinders, both the equipment cost and the learning cost are relatively large.

[0005] Chinese Patent CN 207858530 U discloses a grinding device, including a grinding motor, a grinding disc, a base, a column, and a mounting plate. The column is vertically fixed on the base, the mounting plate is vertically arranged on the column, the grinding motor is arranged on the mounting plate, and the rotating shaft of the grinding motor is fixedly connected to the grinding disc. It further includes a mounting wall and a screw-nut lifting table. There is a threaded hole on the mounting plate, an external thread is provided on the outer wall of the mounting wall, the mounting wall is threadedly connected in the threaded hole of the mounting plate, and the upper and lower ends of the mounting wall penetrate through the mounting plate, and the grinding motor is fixed on the mounting wall; the screw-nut lifting table is fixed on the base and is located below the grinding disc. Chinese Patent CN 214771342 U discloses a simple grinding and leveling tooling, including a column, a lifting screw, a fixed clamp block, and a movable clamp block. A first threaded hole is vertically arranged in the column, a second threaded hole is vertically arranged in the fixed clamp block, one end of the lifting screw is screwed in the first threaded hole and the other end is screwed in the second threaded hole. A plurality of vertical arc-shaped grooves are provided on one side surface of the fixed clamp block. The movable clamp block is arranged on the same side of the side surface of the fixed clamp block provided with the grooves. Each side of the movable clamp block horizontally penetrates through a clamping screw, and the fixed clamp block is provided with a third threaded hole matching the clamping screw on both sides of the groove, and the third threaded hole does not intersect with the second threaded hole. Both of these two grinding devices can achieve local repair welding under specific working conditions, but they are both designed for specific working conditions and have limited processing accuracy, and cannot meet the needs of more local repair welding. Summary of the Invention

[0006] The object of the present invention is to solve the technical problems that existing local repair by welding has high costs when grinding with a CNC machining center and insufficient accuracy when grinding manually, and to provide a fine-tuning device for surface grinding of a grinding tool.

[0007] In order to achieve the above object and complete the above concept, the technical solution provided by the present invention is as follows:

[0008] A fine-tuning device for surface grinding of a grinding tool, which is used for fine-tuning the height position of the grinding tool, is characterized in that:

[0009] It includes a base, a column, a cross bar, a lifting screw handle and a cross bar clamping handle; the bottom surface of the base is used as the reference horizontal plane;

[0010] The column is detachably connected to the base and fixed by a column locking screw; a rectangular groove is provided in the middle of the column and penetrates the base horizontally; a lifting screw with an external thread is provided in the rectangular groove, and the diameter of the lifting screw is larger than the groove depth of the rectangular groove; the lifting screw handle passes through the upper end of the column and is connected to the lifting screw;

[0011] One end of the cross bar is provided with a square groove in the vertical direction. The cross bar is slidably sleeved on the column and the lifting screw through the square groove, and internal threads adapted to the outer diameter of the lifting screw are provided on both sides of the middle of the square groove. The internal threads and the external threads of the lifting screw form a thread pair; a grinding tool mounting hole that penetrates vertically is provided at the other end of the cross bar for mounting the grinding tool and is fixed by a grinding tool locking screw.

[0012] On the vertical plane where the axes of the square groove and the grinding tool mounting hole are located on the cross bar, starting from the vertical line near the square groove in the middle of the cross bar and towards the square groove, a column locking slot that penetrates the cross bar is provided. Clamping through holes that penetrate horizontally through both sides of the cross bar and are perpendicular to the plane side walls are provided at the plane side wall positions on both sides of the column locking slot; the cross bar clamping handle is arranged in the clamping through hole, and the connecting end of the cross bar clamping handle is in threaded cooperation with the clamping through hole to perform side fixing and locking on the cross bar.

[0013] Further, the cross section of the column is a straight-sided ellipse, and the diameter of the lifting screw is larger than the distance between the two straight sides of the straight-sided ellipse; the cross section of the square groove is adapted to the cross sections of the column and the lifting screw.

[0014] Further, one end of the cross bar is thicker than the other end, and the middle part is smoothly transitioned through an inclined plane; the thickness of the other end of the cross bar is 10% of the length of the grinding tool.

[0015] Furthermore, along the vertical plane where the axis of the square groove and the grinding tool mounting hole are located on the cross bar, a grinding tool locking slit is respectively formed in the direction of the grinding tool mounting hole with the vertical line in the middle of the cross bar close to the grinding tool mounting hole as the starting point, and a cross bar locking hole is formed on the plane side walls on both sides of the grinding tool locking slit, which horizontally passes through both sides of the cross bar and is perpendicular to the plane side walls; the grinding tool locking screw is threadedly connected to the cross bar locking hole, and is used for side-fixing and locking the grinding tool;

[0016] The distance between two vertical lines in the middle of the crossbar close to the square groove and close to the grinding tool mounting hole is greater than 20% of the length of the crossbar.

[0017] Furthermore, the base is provided with a base elastic hole and a column mounting hole which are vertically connected, and along the vertical plane where the axes of the base elastic hole and the column mounting hole are located, a base locking slit which is connected through the base is provided with the axis of the base elastic hole as the starting point in the direction of the column mounting hole outward, and base locking holes which are horizontally connected through the base and are perpendicular to the plane side walls are provided at the plane side walls on both sides of the base locking slit;

[0018] A threaded connecting rod is provided at the lower end of the column, which is threadedly connected to the column mounting hole; the column locking screw is threadedly connected to the base locking hole, which is used to side-lock the column.

[0019] Furthermore, a lifting through hole connected to the rectangular groove is provided at the upper end of the column along the axial direction;

[0020] A handle mounting hole is provided at the upper end of the lifting screw along the axis, and a first pin hole is provided near the upper end, which runs horizontally through and is connected to the handle mounting hole. A corresponding second pin hole is provided at the connecting end of the lifting screw handle, and the connecting end passes through the lifting through hole and extends into the handle mounting hole. The first pin hole and the second pin hole are connected by an elastic cylindrical pin.

[0021] Furthermore, the column and the threaded connecting rod are coaxially connected via a cylindrical transition rod, and the diameter of the cylindrical transition rod is smaller than that of the threaded connecting rod;

[0022] The column, the threaded connecting rod and the cylindrical transition rod are an integrated structure.

[0023] Furthermore, a first tool socket is provided at the lower end of the column, and the first tool socket is located between the rectangular groove and the cylindrical transition rod; a second tool socket is provided in the middle of the gripping end of the lifting screw handle; and a third tool socket is provided in the middle of the gripping end of the crossbar clamping handle.

[0024] Furthermore, the base is a rectangular block, the elastic hole of the base is located in the middle, and the locking seam of the base is oriented toward one side along the long side of the rectangular block; and two corners on the other side of the rectangular block are chamfered.

[0025] Furthermore, the thread pair specification of the cross bar and the lifting screw is M18x1.

[0026] Advantages of the present invention compared with the prior art:

[0027] 1. A fine-tuning device for surface grinding of a grinding tool provided by the present invention is designed based on the auxiliary fine-tuning operation during manual grinding. A lifting screw is arranged in the rectangular groove of the column, and a square groove is arranged in the cross bar. The height fine-tuning is realized through the thread pair cooperation between the square groove and the lifting screw. The adjustment accuracy is high and it is easy to use. It can quickly perform a small amount of height adjustment without tools, realize grinding with different height differences, replace equipment repair with manual work, and reduce the production cycle and production cost.

[0028] 2. A fine-tuning device for surface grinding of a grinding tool provided by the present invention selects a column with a straight-edge elliptical shape, designs the cross-section of the square groove to be adapted to the cross-sections of the column and the lifting screw, and designs a cylindrical transition rod between the column and the threaded connecting rod. The structure is compact and reasonable, and it is easy to use.

[0029] 3. A fine-tuning device for surface grinding of a grinding tool provided by the present invention respectively sets a column locking seam, a grinding tool locking seam, and a base locking seam to ensure the stability of the fine-tuning device, thereby ensuring the processing accuracy.

[0030] 4. A fine-tuning device for surface grinding of a grinding tool provided by the present invention sets tool insertion holes at positions that need to be frequently adjusted (two handles and the column), enabling it to quickly adjust the clamping degree through tools such as screwdrivers, greatly reducing the adjustment difficulty and simplifying the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic structural diagram of an embodiment of a fine-tuning device for surface grinding of a grinding tool of the present invention;

[0032] Figure 2 is an exploded view of the embodiment of the present invention;

[0033] Figure 3 is the front view of the embodiment of the present invention;

[0034] Figure 4 is Figure 3 the A-A cross-sectional view of

[0035] Figure 5 is Figure 3 the right view of

[0036] Figure 6 is Figure 3 the top view of

[0037] Figure 7 is a schematic use diagram of the embodiment of the present invention, where A, B, C, and D are schematic diagrams of four different use modes respectively.

[0038] Reference numerals in the drawings:

[0039] 1 - Base, 11 - Elastic hole of the base, 12 - Column mounting hole, 13 - Locking hole of the base; 2 - Column locking screw;

[0040] 3 - Column, 31 - Threaded connecting rod, 32 - Cylindrical transition rod, 33 - Rectangular groove, 34 - Lifting through hole, 35 - First tool insertion hole;

[0041] 4 - Cross bar, 41 - Square groove, 42 - Clamping through hole, 43 - Grinding tool mounting hole, 44 - Locking hole of the cross bar; 5 - Grinding tool locking screw;

[0042] 6 - Lifting screw, 61 - Handle mounting hole; 7 - Lifting screw handle, 71 - Second tool insertion hole; 8 - Cross bar clamping handle, 81 - Third tool insertion hole; 9 - Elastic cylindrical pin. Specific embodiments

[0043] The following will further illustrate the specific technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings.

[0044] Taking the application of die repair welding as an example, due to the need for local repair welding of the die surface for structural optimization, the repair surface is a plane, located at the lower part of the step. After repair welding, it is not suitable to use a grinding machine for processing. At the same time, since this is a casting molding non - machined surface and has certain requirements for flatness, it is not suitable for manual grinding either. Therefore, a machining center is selected for processing, but the production cost is relatively high. Thus, a grinding auxiliary device that can be manually fine - tuned is needed.

[0045] Figures 1-6 A fine - tuning device for flat grinding of a grinding tool provided in an embodiment of the present invention. In this embodiment, the grinding tool a is a pneumatic grinding pen.

[0046] It includes a base 1, a column locking screw 2, a column 3, a cross bar 4, a grinding tool locking screw 5, a lifting screw handle 7, and a cross bar clamping handle 8; taking a plane (usually the bottom surface) of the base 1 as the reference horizontal plane.

[0047] The base 1 is provided with a vertically penetrating base elastic hole 11 and a column mounting hole 12. Along the vertical plane where the axes of the base elastic hole 11 and the column mounting hole 12 are located, starting from the axis of the base elastic hole 11, a base locking seam penetrating the base 1 is opened towards the column mounting hole 12. Base locking holes 13 that penetrate the base 1 horizontally and are perpendicular to the planar side walls are opened at the planar side wall positions on both sides of the base locking seam; the lower end of the column 3 is provided with a threaded connecting rod 31, which is threadedly connected to the column mounting hole 12; the column locking screw 2 is threadedly connected to the base locking hole 13 and is used to laterally fix and lock the column 3 to ensure its connection rigidity. The base 1 is a rectangular block, the base elastic hole 11 is located in the middle, and the base locking seam faces one side along the long side direction of the rectangular block; chamfers are made at the two corners on the other side of the rectangular block.

[0048] A horizontally penetrating rectangular groove 33 is opened in the middle of the column 3, and a lifting through hole 34 communicating with the rectangular groove 33 is opened at the upper end along the axial direction; a lifting screw rod 6 with an external thread is provided in the rectangular groove 33, and the diameter of the lifting screw rod 6 is greater than the groove depth of the rectangular groove 33; a handle mounting hole 61 is opened at the upper end of the lifting screw rod 6 along the axis, and a first pin hole that penetrates horizontally and communicates with the handle mounting hole 61 is provided near the upper end position. A corresponding second pin hole is provided at the connecting end of the lifting screw rod handle 7. Its connecting end passes through the lifting through hole 34 and extends into the handle mounting hole 61, and the first pin hole and the second pin hole are connected by an elastic cylindrical pin 9; the cross-section of the column 3 is a straight-sided ellipse, and the diameter of the lifting screw rod 6 is greater than the distance between the two straight sides of the straight-sided ellipse.

[0049] The column 3 and the threaded connecting rod 31 are connected by a cylindrical transition rod 32. The diameter of the cylindrical transition rod 32 is smaller than that of the threaded connecting rod 31. The column 3, the threaded connecting rod 31, and the cylindrical transition rod 32 are coaxial and of an integral structure.

[0050] One end of the cross bar 4 is provided with a square groove 41 in the vertical direction. The cross bar 4 is slidably sleeved on the column 3 and the lifting screw rod 6 through the square groove 41. Arc surfaces adapted to the outer diameter of the lifting screw rod 6 are provided on both sides in the middle of the square groove 41. Internal threads are provided on the arc surfaces, and the internal threads and the external threads of the lifting screw rod 6 form a thread pair. The movement of the lifting screw rod 6 is restricted, and it can only rotate within the rectangular groove 33; the thread pair specification of the cross bar 4 and the lifting screw rod 6 is M18x1, that is, the height difference adjusted per revolution is 1 mm. The cross-section of the square groove 41 is adapted to the cross-sections of the column 3 and the lifting screw rod 6.

[0051] A vertically penetrating grinding tool mounting hole 43 is provided at the other end of the cross bar 4; on the vertical plane where the axes of the square groove 41 and the grinding tool mounting hole 43 are located, two vertical lines in the middle of the cross bar 4 close to the square groove 41 and close to the grinding tool mounting hole 43 are respectively taken as starting points, and column locking seams and grinding tool locking seams that penetrate the two ends of the cross bar 4 are respectively provided in the direction of the square groove 41 and the grinding tool mounting hole 43; clamping through holes 42 that horizontally penetrate the two sides of the cross bar 4 and are perpendicular to the plane side walls are provided at the plane side walls on both sides of the column locking seam; cross bar locking holes 44 that horizontally penetrate the two sides of the cross bar 4 and are perpendicular to the plane side walls are provided at the plane side walls on both sides of the grinding tool locking seam.

[0052] The distance between the vertical line near the square groove 41 and the vertical line near the grinding tool installation hole 43 in the middle of the crossbar 4 is greater than 20% of the length of the crossbar 4; the thickness of one end of the crossbar 4 is greater than the thickness of the other end, and the middle part is smoothly transitioned through an inclined surface. The thickness of the other end of the crossbar 4 is 10% of the length of the grinding tool a.

[0053] The connecting end of the crossbar clamping handle 8 is threadedly matched with the clamping through hole 42 for side locking of the crossbar 4; the grinding tool locking screw 5 is threadedly connected with the crossbar locking hole 44 for side locking of the grinding tool a.

[0054] In the embodiment of the present invention, in order to facilitate the use of tools such as screwdrivers to quickly adjust the clamping force, a first tool socket 35 is provided at the lower end of the column 3, and the first tool socket 35 is located between the rectangular groove 33 and the cylindrical transition rod 32; a second tool socket 71 is provided in the middle of the gripping end of the lifting screw handle 7; and a third tool socket 81 is provided in the middle of the gripping end of the cross bar clamping handle 8.

[0055] The method of using the embodiment of the present invention is as follows:

[0056] 1. For flat surface repair and rework, it is necessary to manually use a handheld grinding tool to remove most of the weld at the repair site, and then use this device for fine grinding.

[0057] 2. According to the requirements of grinding conditions, refer to Figure 7 There are four different usage examples (A and B are schematic diagrams of the forward and reverse installation of the cross bar 4, C and D are schematic diagrams of the rotation of the column 3 at different angles), the column 3 can be adjusted to any angle, and the cross bar 4 can be installed in the forward and reverse directions to achieve a reasonable grinding state of the wind grinding pen.

[0058] 3. When adjusting, first loosen the grinding tool locking screw 5, the lifting screw handle 7 and the crossbar clamping handle 8. The height can be fine-tuned by the threaded pair of the crossbar 4 and the lifting screw 6. After adjusting to the appropriate height, tighten the fastening screws or handles.

[0059] 4. According to the remaining amount of welding bead at the grinding area, the machining can be adjusted layer by layer and multiple times as the case may be. When grinding, the reference surface of the base 1 should be closely attached to the workpiece. The grinding method is similar to measuring the height with a height gauge. Gradually grind the repaired welding area of the workpiece until it is flat, and the grinding is completed.

[0060] The above content is only one embodiment of the present invention, and it is not a limitation on the protection scope of the present invention. Any equivalent transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A fine-adjusting device for flat grinding of a grinding tool, used for fine-adjusting the height position of a grinding tool (a), characterized in that: It comprises a base (1), a column (3), a crossbar (4), a lifting screw handle (7) and a crossbar clamping handle (8); the bottom surface of the base (1) is used as a reference horizontal plane; The column (3) is detachably connected to the base (1) and fixed by a column locking screw (2); a rectangular groove (33) is provided in the middle of the column (3) and horizontally passes through the base (1); a lifting screw (6) with an external thread is provided in the rectangular groove (33), and the diameter of the lifting screw (6) is greater than the groove depth of the rectangular groove (33); the lifting screw handle (7) passes through the upper end of the column (3) and is connected to the lifting screw (6); One end of the cross bar (4) is provided with a square groove (41) in the vertical direction, and the cross bar (4) is slidably mounted on the column (3) and the lifting screw (6) through the square groove (41), and both sides of the middle of the square groove (41) are provided with internal threads that match the outer diameter of the lifting screw (6), and the internal threads and the external threads of the lifting screw (6) form a thread pair; the other end of the cross bar (4) is provided with a vertically through grinding tool installation hole (43) for installing a grinding tool (a) and fixing it through a grinding tool locking screw (5); A vertical plane on the cross bar (4) where the axis of the square groove (41) and the grinding tool mounting hole (43) is located is provided with a column locking slit that passes through the cross bar (4) in the direction of the square groove (41) with a vertical line in the middle of the cross bar (4) close to the square groove (41) as a starting point, and a clamping through hole (42) that passes through both sides of the cross bar (4) and is perpendicular to the plane side wall is provided on the plane side wall on both sides of the column locking slit; the cross bar clamping handle (8) is arranged in the clamping through hole (42), and the connecting end of the cross bar clamping handle (8) is threadedly matched with the clamping through hole (42) to side-lock the cross bar (4).

2. A fine-tuning device for flat grinding of a grinding tool according to claim 1, characterized in that: The cross section of the column (3) is a straight-sided ellipse, and the diameter of the lifting screw (6) is larger than the distance between the two straight sides of the straight-sided ellipse; the cross section of the square groove (41) is adapted to the cross sections of the column (3) and the lifting screw (6).

3. A fine-tuning device for flat grinding of a grinding tool according to claim 2, characterized in that: The thickness of one end of the cross bar (4) is greater than that of the other end, and the middle portion has a smooth transition through an inclined surface; the thickness of the other end of the cross bar (4) is 10% of the length of the grinding tool (a).

4. A fine-tuning device for flat grinding of a grinding tool according to any one of claims 1 to 3, characterized in that: The vertical planes on the cross bar (4) where the axes of the square groove (41) and the grinding tool mounting hole (43) are located are respectively provided with grinding tool locking slits penetrating the cross bar (4) in the direction of the grinding tool mounting hole (43) with the vertical lines in the middle of the cross bar (4) close to the grinding tool mounting hole (43) as starting points, and cross bar locking holes (44) penetrating the two sides of the cross bar (4) and being perpendicular to the plane side walls are provided on the plane side walls on both sides of the grinding tool locking slits; the grinding tool locking screws (5) are threadedly connected to the cross bar locking holes (44) for side-fixing and locking the grinding tool (a); The distance between two vertical lines in the middle of the crossbar (4) close to the square groove (41) and close to the grinding tool mounting hole (43) is greater than 20% of the length of the crossbar (4).

5. A fine-tuning device for flat grinding of a grinding tool according to claim 4, characterized in that: The base (1) is provided with a base elastic hole (11) and a column mounting hole (12) which are vertically connected, and a base locking slit which passes through the base (1) is provided along a vertical plane where the axes of the base elastic hole (11) and the column mounting hole (12) are located, starting from the axis of the base elastic hole (11) and extending outwardly in the direction of the column mounting hole (12), and base locking holes (13) which pass through the base (1) horizontally and are perpendicular to the plane side walls are provided on the plane side walls on both sides of the base locking slit; The lower end of the column (3) is provided with a threaded connecting rod (31) which is threadedly connected to the column mounting hole (12); the column locking screw (2) is threadedly connected to the base locking hole (13) for side locking of the column (3).

6. A fine-tuning device for flat grinding of a grinding tool according to claim 5, characterized in that: The upper end of the column (3) is provided with a lifting through hole (34) along the axial direction and connected with the rectangular groove (33); The upper end of the lifting screw (6) is provided with a handle mounting hole (61) along the axis, and a first pin hole is provided near the upper end and is horizontally penetrated and connected to the handle mounting hole (61). The connecting end of the lifting screw handle (7) is provided with a corresponding second pin hole, and the connecting end passes through the lifting through hole (34) and extends into the handle mounting hole (61). The first pin hole and the second pin hole are connected by an elastic cylindrical pin (9).

7. A fine-tuning device for flat grinding of a grinding tool according to claim 6, characterized in that: The upright column (3) and the threaded connecting rod (31) are coaxially connected via a cylindrical transition rod (32), and the diameter of the cylindrical transition rod (32) is smaller than that of the threaded connecting rod (31); The upright column (3), the threaded connecting rod (31) and the cylindrical transition rod (32) are an integrated structure.

8. A fine-tuning device for flat grinding of a grinding tool according to claim 7, characterized in that: A first tool insertion hole (35) is provided at the lower end of the upright column (3), and the first tool insertion hole (35) is located between the rectangular groove (33) and the cylindrical transition rod (32); a second tool insertion hole (71) is provided at the middle of the gripping end of the lifting screw handle (7); and a third tool insertion hole (81) is provided at the middle of the gripping end of the crossbar clamping handle (8).

9. A fine-tuning device for flat grinding of a grinding tool according to claim 8, characterized in that: The base (1) is a rectangular block, the base elastic hole (11) is located in the middle, and the base locking seam faces one side along the long side of the rectangular block; the two corners on the other side of the rectangular block are chamfered.

10. A fine-tuning device for flat grinding of a grinding tool according to claim 1, characterized in that: The thread pair specification of the cross bar (4) and the lifting screw (6) is M18x1.

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