A full-automatic grinding device for TNGG type turning tool piece row groove

Abstract

The application discloses a full-automatic grinding TNGG type tool blade row groove equipment, including: a machine table, a clamp arranged on the machine table, a positioning mechanism arranged on the clamp, and a measuring device arranged on the side of the machine table, the positioning mechanism comprises: a positioning pad arranged on the clamp, a positioning sheet arranged on the positioning pad, a side pushing mechanism arranged on the side of the positioning sheet, and a blade pressure head arranged above the positioning sheet, the contact between the positioning sheet and the blade is a straight line, and the straight line is in close contact with the measuring width reference surface of the blade to position. The reference surface of the blade is closely attached to the positioning sheet, and the blade is tightly pushed by the side pushing mechanism, the positioning mode is simple and effective, the structure is simple, the machine is convenient to adjust, the applicability is strong, the machining demand of the TNGG type blade is met, and the data of the blade is compensated through the measuring device, the machining precision is improved, and the blade quality and the market competitiveness of the blade are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of automatic processing technology, and in particular to a full-automatic TNGG blade slotting device. BACKGROUND

[0002] Please refer to Figure 1 、 Figure 2 , TNGG blades are widely used in the field of machining, and the size of the machined blades is required to be relatively high, especially the blade width size 100, which determines the feed amount of the blade when processing the product. The feed amount and the blade width size need to be matched, and if the blade width size tolerance is too large, it will directly affect the service life of the blade. With the increasing precision requirements of users for the slotting of the blade, the previous process is difficult to meet the precision requirements for mass production. Please refer to Figure 3 , the variation of the blade width size △Y and the height direction variation △Z have a relationship of △Z / △Y≈1 / 4, so the blade width size will be amplified by about 4 times with the change of the height direction, so it is difficult to meet the production requirements of such high precision. In order to reduce costs, many blade manufacturers omit the process of grinding the periphery of the blade, resulting in an unsatisfactory periphery of the blade. These two reasons seriously affect the blade width size precision of the machined blade.

[0003] Please refer to Figure 4 , there are mainly two ways to open the slot of the existing such blade, the first is to use a 60° V block 200 to position the front end of the blade, and then use the bottom surface of the blade as the height direction reference surface, so as to grind the blade. This way of opening the TNGG blade slot is very convenient for production and adjustment, so this way is widely used, and most of the slotting of such blades uses this scheme. However, there is a problem that the positioning reference during slotting does not coincide with the reference during measurement, resulting in changes in production size. In theory, the front and back directions of the blade need to use the B surface of the blade as the reference surface for processing, but the design of the positioning piece uses a 60° V block 200 design, which introduces blade angle error. The actual angle of the blade cannot be ideal 60°, especially the blade without grinding the periphery, so that the B surface of the front end of the blade is not in close contact with the positioning surface, resulting in changes in production size; in addition, the bottom surface of the blade is used as the production reference surface in the height direction, but the actual slotting surface is the upper surface A of the blade, so the thickness error of the blade will cause changes in the slotting size. Because the size variation in the thickness direction will cause the size relationship of the blade width variation to be △Z / △Y≈1 / 4, the thickness size variation of the blade will cause the blade width to change dramatically, so this production method is suitable for the production of blades with low precision requirements.

[0004] The second way is to make the pressure head on the bottom surface of the blade, and the positioning surface of the upper and lower positions is made near the upper surface A of the blade. The front of the blade uses the plane B which is connected with the blade width to position. The positioning method used in this way is completely coincided with the detection reference surface A and B during the detection and measurement of the blade. Therefore, the slotting production precision of this type of blade is higher. However, this type of scheme has the problems of complex fixture design and large size, and is only suitable for some of this type of blade, and the application range is not wide. Many of this type of blade cannot use this scheme only because of different sizes. At the same time, it is also very inconvenient to adjust the machine, and it is also very easy to produce interference. Since the positioning is in the height direction, the positioning surface is coincided with the upper surface A of the blade, and the upper surface A of the blade is also the theoretical machining reference surface, so the thickness dimension of the blade will not affect the slotting precision. Using the front surface B of the blade as the reference surface makes the positioning surface coincided with the surface B, so the theoretical machining precision is higher. Basically, the only thing that affects the size of the blade is the thermal expansion of the machining shaft during the back and forth movement of the installation fixture, which causes the change of the height direction of the blade, thereby affecting the slotting precision of the blade. Since the height direction variable has a 1 / 4 change relationship, even a small change will still have a considerable impact on the blade width size.

[0005] Because the blade has three sizes, the previous production method will greatly affect the blade width size. First, the periphery of the first blade, if the periphery is not straight, it will seriously affect the positioning of the blade; second, the included angle of the two surfaces of the periphery of the blade, if a V-shaped positioning block is used, the positioning block cannot completely position the blade, because without grinding the periphery, the included angle of the blade cannot completely coincide with the included angle of the V-shaped block, so this positioning method is not ideal. In the case of not grinding the periphery, the straightness of the edge and the ideal size of the included angle will inevitably occur. With the reduction of the price of the blade and the maturity of the process of die casting and sintering of the blade, the application of the blade without grinding the periphery is also very extensive, so a new process is needed to control the blade width size in this application. Another is the influence of the thickness size change of the blade on the blade width. The thickness tolerance of the blade with good control is within ±0.01mm, so the corresponding change of the blade width is within ±0.04mm, which cannot produce a high-precision blade width. The thickness tolerance of the general blade is within ±0.025mm, and the corresponding change of the blade width is within ±0.1mm, which has exceeded the maximum allowable deviation. Even the tolerance range of 0-0.1mm cannot be reached. Here, the thermal expansion of the guide rail and the size change of the grinding wheel are not considered. Therefore, a method is urgently needed to solve the above problems and to effectively improve the blade width precision.

[0006] Therefore, the prior art has defects and needs to be improved. SUMMARY

[0007] The present application aims to overcome the deficiencies of the prior art and provide a full-automatic TNGG-type turning tool blade row slot grinding device.

[0008] The technical scheme of the present application is as follows: a full-automatic TNGG-type turning tool blade row slot grinding device is provided, which comprises a machine table, a clamp arranged on the machine table, a positioning mechanism arranged on the clamp, and a measuring device arranged on the side of the machine table, wherein the positioning mechanism comprises a positioning pad arranged on the clamp, a positioning sheet arranged on the positioning pad, a side pushing mechanism arranged on the side of the positioning sheet, and a blade pressing head arranged above the positioning sheet, the contact between the positioning sheet and the blade is a straight line, and the straight line is in close contact with the measuring width reference surface of the blade for positioning.

[0009] Further, the positioning sheet is in a U-shaped structure.

[0010] Further, the contact surface of the positioning sheet and the blade is provided with an inclined surface.

[0011] Further, a plurality of line cutting grooves are arranged on the positioning pad.

[0012] Further, the side pushing mechanism comprises a power mechanism arranged on the machine table, a straight edge side pushing rod arranged on the output end of the power mechanism, a V-shaped groove side pushing rod movably connected with the straight edge side pushing rod, and a spring arranged between the straight edge side pushing rod and the V-shaped groove side pushing rod, and the front end of the V-shaped groove side pushing rod is provided with a V-shaped groove.

[0013] Further, a limiting rod is arranged on the V-shaped groove side pushing rod, a waist-shaped groove is arranged on the straight edge side pushing rod corresponding to the limiting rod, and the limiting rod is embedded in the waist-shaped groove.

[0014] Further, the measuring device comprises a mounting table arranged on the side of the machine table, an adjusting sliding table arranged on the mounting table, a sliding table air cylinder arranged on the adjusting sliding table, a contact sensor arranged on the output end of the sliding table air cylinder, and a measuring needle connected with the contact sensor, the adjusting sliding table adjusts the measuring position of the contact sensor up and down and front and back, and the sliding table air cylinder drives the contact sensor to move up and down.

[0015] Adopting the above scheme, the machining precision can be greatly improved, the blade width tolerance can be controlled between ±0.01-0.02mm, and the blade product quality is ensured. The machining precision is not affected by the blank quality, and neither the thickness size, the inscribed circle size nor the angle size of the blade will affect the slotting precision of the blade, so it is not necessary to perform fine finishing on the size of the blank in advance, the blade width size precision can be ensured, and the slotting demand of the blade without grinding periphery is suitable. Therefore, the equipment provided by the application can meet the slotting machining demand of different specifications of TNGG blades, and is not affected by the size of the blade.

[0016] Since the contact type displacement sensor is adopted to find the machining upper surface of the blade, the feedback data and the corresponding machining shaft form a closed loop control, whether the thickness size of the blade changes or the change caused by the thermal expansion of the lead screw and the guide rail is compensated to the corresponding machining shaft, so that the influence of these variables is avoided, and therefore the blade width size of the equipment without thermal machine production is still very stable.

[0017] Meanwhile, the structure of the application is simple, and the machine is convenient to adjust. Compared with the previous clamp using the upper reference positioning method, this structure is much simpler, and can share a clamp with other blade types. When changing products, only some parts of the positioning type directly contacting the blade need to be replaced, and whether in the manufacturing of the clamp or in the later product changing and machine adjusting, great advantages are obtained. Moreover, the blade slotting method does not need to customize the clamp, and still uses the standard down pressure clamp, and when changing the production product, only some parts of the positioning type directly contacting the blade need to be replaced, the machine adjusting time is greatly shortened, and whether the manufacturing cost or other costs generated in the production activity are greatly reduced. Therefore, the application can produce high-quality TNGG blades without increasing the production cost, or even reducing the production cost, and greatly improves the competitiveness of the production of such blades in China. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structure diagram of the blade.

[0019] Figure 2 It is Figure 1 It is a cross-sectional view of E-E.

[0020] Figure 3 It is a calculation relationship diagram of the variation amount △Y of the blade width size and the variation amount △Z of the height direction.

[0021] Figure 4 It is a blade positioning diagram of the existing equipment.

[0022] Figure 5 It is a structure diagram of the application.

[0023] Figure 6 It isFigure 5 Local enlarged view of the positioning piece.

[0024] Figure 7 Structural view of the positioning pad.

[0025] Figure 8 Structural view of the positioning pad.

[0026] Figure 9 Structural view of the side pushing mechanism.

[0027] Figure 10 Structural view of the side pushing mechanism.

[0028] Figure 11 Structural view of the measuring device. DETAILED DESCRIPTION

[0029] The present application will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0030] Please refer to Figure 5 , Figure 6 The present application provides a full-automatic grinding TNGG-type blade slotting device, which comprises a machine table 1, a clamp 2 arranged on the machine table, a positioning mechanism arranged on the clamp, and a measuring device arranged on the side of the machine table 1. The positioning mechanism comprises a positioning pad 3 arranged on the clamp 2, a positioning piece 4 arranged on the positioning pad 3, a side pushing mechanism 5 arranged on the side of the positioning piece 4, and a blade pressing head 6 arranged above the positioning piece 5. The contact between the positioning piece 4 and the blade is a straight line, and the straight line is in close contact with the measuring width reference surface of the blade to position the blade. The positioning piece 4 is not designed in the form of a V-shaped groove commonly used in the prior art, but is positioned by being in close contact with the measuring width reference surface B of the blade edge width, and this positioning method will not change the blade edge width due to the non-ideal peripheral size of the blade.

[0031] When performing the grinding processing of the TNGG-type blade slotting, the blade is placed on the positioning pad 3, and the measuring width reference surface of the blade is directed towards the direction of the positioning piece 4. The side pushing mechanism 5 is started to tightly push the blade between the side pushing mechanism 5 and the positioning piece 4, and then the blade is tightly pressed by the blade pressing head 6 to realize clamping, so as to process the blade. The blade is positioned by the positioning piece 4 in close contact with the measuring width reference surface of the blade edge width in a straight line, so as to avoid the change of the blade edge width due to the non-ideal peripheral size of the blade, thereby ensuring the precision of the grinding processing of the blade slotting. At the same time, the corresponding side pushing mechanism 5 and positioning piece 4 can be replaced according to the size of the blade to meet the processing requirements of different specifications of the blade, and the application range is wide.

[0032] Please refer toFigure 7 The positioning sheet 4 is in U-shaped structure, which is convenient for guiding the movement of the side pushing mechanism 5 and meets the requirement of clamping the blade between the side pushing mechanism 5 and the positioning sheet 4.

[0033] The contact surface of the positioning sheet 4 with the blade is provided with an inclined surface, which reduces the area of the positioning surface while measuring the reference line as close to the upper surface of the blade as possible, thereby avoiding the influence of the non-ideal periphery surface of the blade on the accuracy.

[0034] Please refer to Figure 8 The positioning gasket 3 is provided with a plurality of line cutting grooves 31. The positioning gasket 3 is in contact with the lower surface of the blade, which serves as a support for the blade and plays a role in rough positioning in the height direction of the blade. Because of the deviation of the thickness of the blade and the thermal expansion of the guide rail, the amplification relationship between the variation value in the height direction and the variation value in the blade width causes the positioning gasket 3 to be unable to serve as a fine positioning mode. The positioning gasket 3 can only be used to support the blade and serve as a platform for the processing of the blade, and to make rough positioning for subsequent measurement. The line cutting grooves 31 are provided on the positioning gasket 3, which facilitates the entry of air and other fluids into the bottom of the blade, thereby supporting the blade and avoiding the pressing of the blade by the pressing head 6 on the positioning gasket 3. Because the two surfaces cannot enter the air, the two surfaces are tightly attached, thereby making it impossible for the blade to be clamped by the mechanical hand.

[0035] Please refer to Figure 9 , Figure 10The side pushing mechanism 5 comprises a power mechanism arranged on the machine table 1, a straight side pushing rod 51 arranged on the output end of the power mechanism, a V-shaped groove side pushing rod 52 movably connected with the straight side pushing rod 51, and a spring 53 arranged between the straight side pushing rod 51 and the V-shaped groove side pushing rod 52. The front end of the V-shaped groove side pushing rod 52 is provided with a V-shaped groove 521. After the blade is placed on the positioning pad 3, the power mechanism of the side pushing mechanism 5 is started to push the straight side pushing rod 51 out, the V-shaped groove 521 of the V-shaped groove side pushing rod 52 is in contact with the blade, and the left and right positions of the blade are guided. Then the spring 53 is compressed, the straight side of the straight side pushing rod 51 is in contact with the tip of the blade, so as to push the blade to the positioning surface of the positioning piece 4, and the blade is clamped between the V-shaped groove 521 and the positioning piece 4. The output force of the power mechanism is much greater than the elastic force of the spring 53, and the V-shaped groove side pushing rod 52 is sleeved on the straight side pushing rod 51, and there is a certain floating gap between the two, so that the reference surface of the blade can be ideally matched with the positioning surface of the positioning piece 54. Since the positioning piece 4 only positions the blade in the front and back directions, and the positioning pad 3 only positions the blade in the up and down directions, the left and right positions of the blade are not positioned, so it is necessary to position the blade in the left and right directions. The left and right directions of the blade do not need very high precision positioning, but only need to be positioned to meet the needs of automatic and stable production, so the side pushing mechanism 5 has a positioning demand of the blade to meet the needs of automatic and stable production.

[0036] The V-shaped groove side pushing rod 52 is provided with a limiting rod 522, the straight side pushing rod 51 is provided with a waist-shaped groove 511 corresponding to the limiting rod 522, and the limiting rod 522 is embedded in the waist-shaped groove 511. The limiting rod 522 moves in the waist-shaped groove 511 to limit the extreme relative position between the V-shaped groove side pushing rod 52 and the straight side pushing rod 51.

[0037] Please refer to Figure 11 The measuring device comprises a mounting table 71 arranged beside the machine table 1, an adjusting sliding table 72 arranged on the mounting table 71, a sliding table air cylinder 73 arranged on the adjusting sliding table 72, a contact sensor 74 arranged on the output end of the sliding table air cylinder 73, and a measuring needle 75 connected with the contact sensor 74. The adjusting sliding table 72 adjusts the measuring position of the contact sensor 74 in the up and down and front and back directions, and the sliding table air cylinder 73 drives the contact sensor 74 to move up and down. The adjusting sliding table 72 is used to adjust the position of the contact sensor 74, so that the measuring needle 75 can move and align with the position to be measured. Then the contact sensor 74 is driven by the sliding table air cylinder 73 to move, so that the measuring needle 75 completes the measurement and disengagement action of the blade. After the reference position is zeroed, the distance between the blade position during measurement and the zero position is calculated to obtain the data.

[0038] The measuring device can detect the blank of the blade, the position change of the upper surface of the blade caused by the thickness size change of the blade and the thermal expansion of the guide rail, and then compensate the upper surface of the blade by comparison with the zero point, so as to eliminate the influence of the thickness of the blade and the thermal expansion of the guide rail on the blade edge width machining. Meanwhile, the measuring device can detect the finished product of the blade after the blade is machined, and compare the machining position of the blade with the calibration zero point of the finished product detection, so as to calculate the deviation value. The deviation value is compensated to the subsequent slotting machining, the precision influence caused by the expansion and wear of the grinding wheel and the thermal expansion of the upper and lower Z-axis lead screws is corrected, so as to improve the precision and quality of the edge width size machining.

[0039] The specific machining process of the device is as follows: the external material taking mechanism places the blade on the positioning pad 3, at this time the blade pressing head 6 pre-presses the upper surface of the blade. Then the power mechanism drives the straight edge side push rod 51 to move forward, first the V-shaped groove side push rod 52 contacts the blade to position the left and right positions of the blade. The straight edge side push rod 51 continues to move forward, and then the straight edge side push rod 51 contacts the sharp part of the blade, so that the front end surface B of the blade is tightly attached to the positioning surface of the positioning pad 4. After positioning, the blade pressing head 6 further compacts the blade to fix the blade. Then the blade is moved to the corresponding position of the detection device, the blank of the blade is detected by the detection device, so as to find the upper surface A of the blade, and the variation value is compensated to the corresponding machining axis. Next, the blade is machined, and after the machining is completed, the blade is moved to the corresponding position of the detection device to detect the machining part of the blade, and then the variation value of the finished product is compensated to the blade in subsequent machining. Then the blade is moved to the material taking and placing position, the blade pressing head 6 is loosened, the side push mechanism 5 is loosened, the material taking mechanism clamps the blade, and then the next unprocessed blade is placed for the next round of machining.

[0040] The present application can greatly improve the machining precision, and can control the edge width tolerance to be between ±0.01-0.02mm, so as to guarantee the quality of the blade product. The machining precision is not affected by the quality of the blank, and neither the thickness size of the blade, the inscribed circle size nor the angle size will affect the slotting precision of the blade, so it is not necessary to pre-finish the size of the blank, the edge width size precision can be guaranteed, and it is suitable for the slotting demand of the blade without grinding the periphery. Therefore, the device provided by the present application can meet the slotting machining demand of different specifications of TNGG type blades, and is not affected by the size of the blade.

[0041] Since the contact type displacement sensor is used to find the machining upper surface of the blade, the feedback data and the corresponding machining axis form a closed loop control, whether the thickness size of the blade changes or the change caused by the thermal expansion of the lead screw and the guide rail will be compensated to the corresponding machining axis, so as to avoid the influence of these variables, so even if the device does not have the thermal machine produced blade edge width size is still very stable.

[0042] Meanwhile, the structure of the present application is simple, and the machine adjustment is convenient. Compared with the previous clamp using the base positioning mode, the structure is much simpler, and can be shared with other blade types. When changing products, only the positioning parts directly contacting the blade need to be replaced. Whether in the manufacture of the clamp or the later change of the product, the present application has great advantages. Moreover, the slotting mode of the blade does not need to customize the clamp, and still uses the standard down pressure clamp. When changing the production product, only some parts of the positioning parts directly contacting the blade need to be replaced, and the machine adjustment time is greatly shortened. Whether in the manufacturing cost or other costs generated in the production activity, the present application greatly reduces the cost. Therefore, the present application can produce high-quality TNGG type blades without increasing the production cost, and even reduces the production cost, greatly improving the competitiveness of the production of such blades in China.

[0043] In summary, the present application can meet the processing requirements of the TNGG type blade by tightly attaching the blade reference surface to the positioning piece and tightly pushing the blade through the side pushing mechanism. The positioning mode is simple and effective, the structure is simple, the machine adjustment is convenient, the applicability is strong, the processing precision is improved by the measuring device to compensate the data of the blade, and the quality and market competitiveness of the blade are improved.

[0044] The above is only a preferred embodiment of the present application, and is not used to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A full-automatic grinding device for TNGG-type turning tool blade row slot, characterized in that, It includes a machine table, a clamp arranged on the machine table, a positioning mechanism arranged on the clamp, and a measuring device arranged beside the machine table. The positioning mechanism includes a positioning pad arranged on the clamp, a positioning sheet arranged on the positioning pad, a side pushing mechanism arranged beside the positioning sheet, and a blade pressing head arranged above the positioning sheet. The contact between the positioning sheet and the blade is a straight line, which is in close contact with the measuring width reference surface of the blade for positioning.

2. The apparatus for full-automatic grinding TNGG-type turning tool insert row grooves according to claim 1, characterized in that, The measuring device includes a mounting table arranged beside the machine table, an adjusting sliding table arranged on the mounting table, a sliding table cylinder arranged on the adjusting sliding table, a contact sensor arranged on the output end of the sliding table cylinder, and a measuring needle connected with the contact sensor.

3. The apparatus for full-automatic grinding TNGG type turning tool piece row of relief groove according to claim 1, characterized in that, The adjusting sliding table adjusts the measuring position of the contact sensor up and down and front and back, and the sliding table cylinder drives the contact sensor to move up and down.

4. The apparatus for full-automatic grinding TNGG type turning tool piece row of relief groove according to claim 1, characterized in that, The positioning sheet has a U-shaped structure.

5. The apparatus for full-automatic grinding TNGG type turning tool blade row slot of claim 1, wherein, The contact surface of the positioning sheet and the blade is provided with an inclined surface.

6. The apparatus for fully automatic grinding TNGG type turning tool insert row of relief grooves according to claim 5, characterized in that, The positioning pad is provided with a plurality of line cutting grooves. The side pushing mechanism includes a power mechanism arranged on the machine table, a straight edge side pushing rod arranged on the output end of the power mechanism, a V-shaped groove side pushing rod movably connected with the straight edge side pushing rod, and a spring arranged between the straight edge side pushing rod and the V-shaped groove side pushing rod. The front end of the V-shaped groove side pushing rod is provided with a V-shaped groove. The V-shaped groove side pushing rod is provided with a limiting rod, and the straight edge side pushing rod is provided with a waist-shaped groove corresponding to the limiting rod. The limiting rod is embedded in the waist-shaped groove.

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