Quick positioning and tool changing structure for lathe

Abstract

A quick positioning tool changing structure for a lathe comprises a tool apron and a tool. A mounting groove and a fixing piece are arranged on the tool apron; the tool is composed of a tool bar and a tool bit, and a positioning block with a specific length is arranged at the end of the tool bar of the tool. Wherein the tool bar is in sliding fit with the mounting groove, the positioning block can slide along with the tool bar to abut against the side wall of the tool apron so as to limit the extending length of the tool bit, and the fixing piece is used for locking the tool bar in the mounting groove. In the structure, the positioning block is matched with the tool apron for use, so that the tool can be positioned in the tool changing process, the extension length of the tool bit can be quickly determined, the tool bar can be conveniently and directly locked by the fixing piece to complete tool installation, the cutting precision can be ensured without re-setting after the tool is installed, and the working efficiency is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to lathe tool installation technical field, especially, relate to a quick positioning tool changing structure for lathe. BACKGROUND

[0002] The lathe is the machine tool that mainly uses the tool to carry out cutting processing to the rotating workpiece, in the process of cutting workpiece, the staff needs to select the tool of different specifications according to the shape to be processed of workpiece, or directly adjusts the length of tool bit extension, this operation is called tool changing.

[0003] The tool changing structure of existing lathe is mainly composed of tool holder and tool, the mounting groove for placing tool and the fixing part for locking tool are arranged on the tool holder, due to the limitation of its own structure, the staff needs to check the position relationship between tool and mounting groove every time tool changing, so that the length of tool bit extension meets the demand, and after tool installation, it is also necessary to recheck tooling to ensure cutting accuracy, the whole process is time-consuming and laborious, and the working efficiency is low, therefore, it is necessary to design a new tool changing structure to solve the problem. CONTENT OF THE UTILITY MODEL

[0004] TECHNICAL PROBLEM SOLVED

[0005] The utility model provides a quick positioning tool changing structure for lathe, can position tool quickly and accurately in the tool changing process, and can ensure cutting accuracy without rechecking tooling, and improves the working efficiency.

[0006] TECHNICAL SCHEME

[0007] In order to achieve the above object, the utility model provides the following technical scheme:

[0008] A quick positioning tool changing structure for lathe, including tool holder and tool, the mounting groove and the fixing part are arranged on the tool holder, the tool includes tool bar and the tool bit installed on the tool bar, and the tool is provided with positioning block on the end of tool bar, wherein, the tool bar and the mounting groove are slidingly matched, the positioning block can abut against the side wall of tool holder with the tool bar sliding, to limit the extension length of tool bit, and the fixing part is used for locking the tool bar in the mounting groove.

[0009] Preferably, the positioning block is arranged at one end of the tool bar close to the tool bit, and the positioning block is located on the back of the tool bit, away from the blade installed on the front of the tool bit.

[0010] Preferably, the bottom surface of the tool bit is provided with a chip removal groove, and the positioning block is provided with a chip removal port corresponding to the chip removal groove.

[0011] Preferably, the lengths of the positioning blocks on the plurality of tools are the same or different.

[0012] Preferably, the positioning block, the cutter bar, and the cutter head are integrally formed.

[0013] Preferably, the device further includes a pad and an adjusting member. The pad is provided with a slide rod. The positioning block has a sliding groove that opens towards the tool holder, and the sliding groove is slidably engaged with the slide rod. The adjusting member is installed on the positioning block and is used to drive the slide rod to move along the sliding groove to adjust the relative distance between the pad and the positioning block.

[0014] Preferably, the positioning block has a hidden groove at the opening of the slide groove, and when the slide rod moves inward along the slide groove, it can drive the pad block to completely enter the hidden groove.

[0015] Preferably, the length of the pad is fixed, the slide bar is provided with a scale, and the positioning block is provided with an indicator corresponding to the scale on the side of the slide groove.

[0016] Preferably, the slide bar is provided with a third inclined surface that is offset from the slide groove, and the scale is set on the third inclined surface, so as to avoid the slide bar from wearing the scale during movement.

[0017] Preferably, the adjusting component includes a rack, a gear, and an adjusting bolt; the rack is mounted on the slide rod and extends along the length of the slide rod; the gear is disposed in the slide groove and meshes with the rack; the adjusting bolt is rotatably mounted on the positioning block, and one end of the adjusting bolt passes through the slide groove and is fixed to the gear, rotating the adjusting bolt can drive the slide rod to move along the slide groove.

[0018] Preferably, the top of the tool holder is provided with multiple screw holes next to the mounting groove, and the inner wall of the mounting groove is provided with a first inclined surface; the fixing member includes a right-angle plate and a fixing bolt, the right-angle plate is composed of a top plate and a vertical plate, and the top plate is parallel to the top of the tool holder, the vertical plate extends into the mounting groove, and the inner wall of the vertical plate is provided with a second inclined surface that fits against the first inclined surface; the fixing bolt is provided with multiple screw holes; one end of the fixing bolt passes through the top plate and is threaded to the corresponding screw hole, rotating the fixing bolt can drive the top plate to move closer to the top of the tool holder, so as to drive the second inclined surface to move along the first inclined surface to reduce the width of the mounting groove, thereby clamping the tool bar in the mounting groove.

[0019] (III) Beneficial Effects

[0020] This utility model provides a quick positioning tool changer structure for lathes. By designing a mounting groove on the tool holder for placing and moving the tool holder, and designing a positioning block on the tool holder for use with the tool holder, the tool head is quickly and accurately positioned during the placement of the tool holder. This allows the fixing component to directly lock the tool holder to complete the tool change, and ensures that high cutting accuracy is achieved without the need for re-tool setting after the tool change, effectively improving work efficiency. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0022] Figure 1 A schematic diagram of the overall structure of this utility model is shown. Figure One ;

[0023] Figure 2 A schematic diagram of the overall structure of this utility model is shown. Figure Two ;

[0024] Figure 3 A schematic diagram of the overall structure of this utility model is shown. Figure Three ;

[0025] Figure 4 A schematic diagram of the structure of one embodiment of the cutting tool of this utility model is shown;

[0026] Figure 5 A schematic diagram of the structure of the tool holder of this utility model is shown. Figure One ;

[0027] Figure 6 A schematic diagram of the structure of the tool holder of this utility model is shown. Figure Two ;

[0028] Figure 7 A schematic diagram of the overall structure of this utility model is shown. Figure Four ;

[0029] Figure 8 It shows Figure 7 The main view;

[0030] Figure 9 A schematic diagram of another embodiment of the cutting tool of this utility model is shown. Figure One ;

[0031] Figure 10 It shows Figure 8 A sectional view;

[0032] Figure 11 A schematic diagram of another embodiment of the cutting tool of this utility model is shown. Figure Two ;

[0033] Figure 12 A schematic diagram of the structure of the pad and adjusting component of this utility model is shown.

[0034] In the diagram: 1. Tool holder, 11. Mounting slot, 11m first inclined plane, 12. Fixing component, 121. Right angle plate, 1211. Top plate, 1212. Vertical plate, 121m second inclined plane, 122. Fixing bolt, 13. Screw hole, 2. Tool, 21. Tool holder, 22. Tool head, 220. Chip removal groove, 23. Positioning block, 230. Chip removal port, 231. Slide groove, 232. Hidden groove, 23k indicator, 24. Blade, 3. Pad, 31. Slide rod, 31k scale, 31m third inclined plane, 4. Adjusting component, 41. Rack, 42. Gear, 43. Adjusting bolt. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this application. It is understood that the accompanying drawings are provided for reference and illustration only, and are not intended to limit this application. The connection relationships shown in the accompanying drawings are only for clear description and do not limit the connection method.

[0036] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component, or there may be an intervening component. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It should also be noted that, unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; as a mechanical connection or an electrical connection; or as a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application.

[0037] It should also be noted that in the description of this application, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] See appendix Figure 1 - Appendix Figure 6 A quick-positioning tool changer for a lathe includes a tool holder 1 and a tool 2. The tool holder 1 is provided with a mounting groove 11 and a fixing member 12. The tool 2 includes a tool shank 21 and a tool head 22 mounted on the tool shank 21. The tool 2 is provided with a positioning block 23 of a specific length at the end of the tool shank 21. The tool shank 21 is slidably engaged with the mounting groove 11. The positioning block 23 can slide with the tool shank 21 and abut against the side wall of the tool holder 1 to limit the extension length of the tool head 22. The fixing member 12 is used to lock the tool shank 21 in the mounting groove 11.

[0039] Specifically, when installing the tool 2, place the tool shank 21 in the mounting groove 11 and slide the tool shank 21 so that the positioning block 23 abuts against the side wall of the tool holder 1. Then, lock the tool shank 21 in the mounting groove 11 using the fixing member 12. When replacing the tool 2, first release the restriction of the fixing member 12 on the tool shank 21, place the tool shank 21 of other specifications of tool 2 with positioning block 23 in the mounting groove 11, and then repeat the above installation steps. Since the length of the positioning block 23 is equal to the extension length of the tool head 22 after the tool 2 is installed, the position of the tool head 22 can be quickly and accurately adjusted during the process of the positioning block 23 abutting against the tool holder 1 so that the extension length of the tool head 22 meets the requirements.

[0040] In summary, this utility model, by designing an installation groove 11 on the tool holder 1 for placing and moving the tool holder 21, and by designing a positioning block 23 on the tool holder 21 for use with the tool holder 1, allows for quick and accurate positioning of the tool head 22 during the placement of the tool holder 21. This facilitates the direct locking of the tool holder 21 by the fixing member 12 to complete the tool change, and ensures high cutting accuracy without the need for re-setting the tool after the tool change, effectively improving work efficiency.

[0041] It should be noted that the lathe mentioned above can be a conventional lathe or a CNC lathe. Due to the variety of lathes, this utility model does not impose any restrictions on this.

[0042] Furthermore, to aid in understanding the solution, this embodiment also illustrates the tool changing process of this tool changing structure in a lathe:

[0043] S1. Stop the machine and disassemble the tool holder 21 to directly replace the new tool 2, or replace only the old blade 24 on the tool holder 21;

[0044] S2. Install the tool holder 21 onto the tool holder 1 and make the positioning block 23 abut against the tool holder 1 to assist in completing the tool installation. After the tool is installed, the MDI tool setting step is omitted.

[0045] S3. Execute the tool setting program for the current product (based on a simple program generated from the current product, only the important outer diameter and height of the product are machined to integer dimensions, which facilitates quick measurement and adjustment, and allows for more intuitive inspection of the tool 2 accuracy).

[0046] S4. Measure the dimensions of the tool setting plate (not shown in the diagram) after replacing the corresponding tool 2. After adjusting the insert 24 according to the tool setting plate, run the tool setting plate program again for retesting.

[0047] S5. After confirming that the tool plate is correct, it indicates that tool 2 is installed in place, and the original main program is executed for cutting.

[0048] Based on the above, it can be seen that using the tool holder 21 with positioning block 23 for tool changing can ensure the consistency of the repeated positioning of the blade 24; after the tool 2 is installed, a simple tool setting program is executed, which can more quickly and intuitively discover and adjust errors, without the need for the operator to wait for the machine to process the first and second products before taking measurements; compared with the existing tool changing process, the tool changing process corresponding to this tool changing structure is simpler to operate, making it easier for novices to get started quickly, and the work efficiency is higher, enabling one person to operate multiple machines at the same time.

[0049] See appendix Figure 1 - Appendix Figure 6 The positioning block 23 is located at one end of the shank 21 near the cutter head 22, and the positioning block 23 is located on the back of the cutter head 22, away from the blade 24 installed on the front of the cutter head 22.

[0050] Specifically, regarding the position of the positioning block 23, it can be set at the end of the tool shank 21 away from the cutter head 22, or it can be set at the end of the tool shank 21 close to the cutter head 22. If the positioning block 23 is set at the end of the tool shank 21 away from the cutter head 22, it must be ensured that the tool shank 21 is much longer than the mounting groove 11, so that when the tool shank 21 is moved forward along the length direction of the mounting groove 11, the positioning block 23 can normally abut against the rear side of the tool holder 1 for auxiliary positioning. If the positioning block 23 is set at the end of the tool shank 21 close to the cutter head 22, even if the tool shank 21 is shorter than the mounting groove 11, the positioning block 23 can still normally abut against the front side of the tool holder 1 for auxiliary positioning when the tool shank 21 is moved backward along the length direction of the mounting groove 11. Therefore, in practical applications, the positioning block 23 is usually set at the end of the tool shank 21 close to the cutter head 22 to improve the adaptability of the tool 2 and make it easier to install.

[0051] In addition, the front of the cutter head 22 is generally equipped with a cutting blade 24 for cutting the workpiece. The cutting blade 24 requires a certain cutting space. If the positioning block 23 is placed on the front of the cutter head 22, it will not only hinder the installation and use of the cutting blade 24, but also the chips generated by cutting will easily contaminate or wear the positioning block 23, resulting in a decrease in its positioning accuracy. However, placing the positioning block 23 on the back of the cutter head 22 and away from the cutting blade 24 can effectively solve this problem.

[0052] See appendix Figure 1 - Appendix Figure 6 The bottom surface of the cutter head 22 is provided with a chip removal groove 220, and the positioning block 23 is provided with a chip removal port 230 corresponding to the chip removal groove 220.

[0053] Specifically, chips are generated during the cutting process of the blade 24. The chip removal groove 220 and the chip removal port 230 work together to ensure that the chips pass smoothly through the bottom of the cutter head 22 and the positioning block 23, thus preventing the chips from hindering the normal use of the blade 24.

[0054] See appendix Figure 1 - Appendix Figure 6 The positioning block 23 may have the same or different lengths on multiple cutting tools 2.

[0055] Specifically, in actual cutting operations, various specifications of cutting tools 2 may be used to cut the workpiece. For example, in the same series of cutting tools 2, positioning blocks 23 with different lengths can be set. In this way, when changing tools, the operator can directly select the cutting tool 2 with the corresponding length of positioning block 23 according to the required extension length of the cutting head 22. Considering the actual damage of the cutting tool 2, in the same series of cutting tools 2, positioning blocks 23 with the same length can also be set. When the tool holder 21 or the cutting head 22 is damaged, a new cutting tool 2 can be used directly for tool replacement. If only the insert 24 is damaged, it is only necessary to disassemble the tool holder 21, replace the old insert 24, and re-clamp the tool holder 21.

[0056] Similarly, in different series of cutting tools 2, the extension length of the cutting head 22 can be the same or different, so the specific length of the positioning block 23 can also be set according to the requirements.

[0057] See appendix Figure 1 - Appendix Figure 6 The positioning block 23, the tool holder 21, and the tool head 22 are integrally formed, which facilitates the production and preparation of the tool 2. Of course, the positioning block 23 can also be fixed to the tool holder 21 by welding or bonding. Since there are various related methods, this utility model does not limit this.

[0058] See appendix Figure 7 - Appendix Figure 12Considering that if the length of the positioning block 23 on the tool 2 is not adjustable, multiple tools 2 will need to be prepared during the actual cutting process, and the frequency of tool disassembly and replacement will be very frequent. To further solve this problem, this utility model also includes a pad block 3 and an adjusting member 4. The pad block 3 is provided with a sliding rod 31; the positioning block 23 is provided with a sliding groove 231 that opens towards the tool holder 1, and the sliding groove 231 slides in cooperation with the sliding rod 31; the adjusting member 4 is installed on the positioning block 23 and is used to drive the sliding rod 31 to move along the sliding groove 231 to adjust the relative distance between the pad block 3 and the positioning block 23.

[0059] Specifically, when it is necessary to adjust the extension length of the cutter head 22, first release the restriction of the fixing member 12 on the cutter bar 21 and slightly move the cutter bar 21 outward to increase the extension length of the cutter head 22; then drive the slide bar 31 outward along the slide groove 231 through the adjusting member 4, so that the relative distance between the pad block 3 and the positioning block 23 increases, which is equivalent to extending the length of the positioning block 23 until the pad block 3 abuts against the cutter holder 1 and the extension length of the cutter head 22 meets the requirements, and then lock the cutter bar 21 again through the fixing member 12; if the extension length of the cutter head 22 still does not meet the requirements after the pad block 3 abuts against the cutter holder 1, the cutter bar 21 can be moved adaptively, and the above steps can be continued to be installed through the adjusting member 4 to drive the slide bar 31 to move.

[0060] Similarly, if it is necessary to reduce the extension length of the cutter head 22, the slide bar 31 is first moved inward along the slide groove 231 by the adjusting member 4, so that the pad block 3 is away from the side wall of the cutter holder 1. During this process, the relative distance between the pad block 3 and the positioning block 23 is reduced to a specific value. Then, the cutter bar 21 is moved slightly until the pad block 3 abuts against the side wall of the cutter holder 1, and then the cutter bar 21 is locked by the fixing member 12.

[0061] It should be noted that during the process of adjusting the relative distance between pad 3 and positioning block 23, staff can use tools such as rulers to measure in order to ensure accuracy.

[0062] See appendix Figure 9 - Appendix Figure 11 The positioning block 23 has a hidden groove 232 at the opening of the slide groove 231. When the slide rod 31 moves inward along the slide groove 231, it can drive the pad block 3 to completely enter the hidden groove 232. This design allows the pad block 3 to be hidden in the positioning block 23 under normal circumstances, which can prevent dust from entering the slide groove 231 and improve the overall aesthetics of the tool 2.

[0063] See appendix Figure 8 - Appendix Figure 12In actual use, it is quite troublesome to measure the relative distance between the pad 3 and the positioning block 23 with the help of tools such as rulers. To solve this problem, in this utility model, the length of the pad 3 is fixed, the slide rod 31 is provided with a scale 31k, and the positioning block 23 is provided with an indicator 23k corresponding to the scale 31k on the side of the slide groove 231.

[0064] Specifically, when the adjusting member 4 drives the slide bar 31 to move along the slide groove 231, the indicator 23k will point to the corresponding position on the scale 31k. By adding the current scale 31k value to the length of the pad 3 itself, the specific distance between the pad 3 and the positioning block 23 can be obtained. This design can effectively improve the convenience of operation and minimize the error caused by using measuring tools.

[0065] See appendix Figure 11 - Appendix Figure 12 The slide bar 31 is provided with a third inclined surface 31m that is offset from the slide groove 231, and the scale 31k is set on the third inclined surface 31m. This design can prevent the scale 31k from contacting the inner wall of the slide groove 231 and causing wear during the movement of the slide bar 31.

[0066] See appendix Figure 9 - Appendix Figure 12 The adjusting component 4 includes a rack 41, a gear 42, and an adjusting bolt 43; the rack 41 is mounted on the slide rod 31 and extends along the length of the slide rod 31; the gear 42 is disposed in the slide groove 231 and meshes with the rack 41; the adjusting bolt 43 is rotatably mounted on the positioning block 23, and one end of the adjusting bolt 43 passes through the slide groove 231 and is fixed to the gear 42.

[0067] Specifically, in use, rotating the adjusting bolt 43 clockwise will cause the slide rod 31 to move inward along the slide groove 231, thereby reducing the relative distance between the pad 3 and the positioning block 23; rotating the adjusting bolt 43 counterclockwise will cause the slide rod 31 to move outward along the slide groove 231, thereby increasing the relative distance between the pad 3 and the positioning block 23.

[0068] The end of the adjusting bolt 43 that extends into the slide groove 231 can be fixed to the gear 42 by means of threaded connection or snap-fit ​​connection, etc., and no limitation is made in this utility model.

[0069] It should be noted that, in addition to the above-mentioned structure, the adjusting member 4 can also use other structures to drive the slide rod 31 to move within the slide groove 231. Since there are many types of related structures and they are relatively common in the mechanical field, this utility model does not impose any restrictions on them.

[0070] See appendix Figure 1 - Appendix Figure 6The top of the tool holder 1 is provided with multiple screw holes 13 next to the mounting groove 11. The inner wall of the mounting groove 11 is provided with a first inclined surface 11m. The fastener 12 includes a right-angle plate 121 and a fixing bolt 122. The right-angle plate 121 is composed of a top plate 1211 and a vertical plate 1212. The top plate 1211 is parallel to the top of the tool holder 1. The vertical plate 1212 extends into the mounting groove 11. The inner wall of the vertical plate 1212 is provided with a second inclined surface 121m that fits the first inclined surface 11m. The fixing bolt 122 is designed with multiple screw holes 13. One end of the fixing bolt 122 passes through the top plate 1211 and is threaded to the corresponding screw hole 13.

[0071] Specifically, when the fixing bolt 122 is rotated clockwise, the fixing bolt 122 can press the top plate 1211 closer to the top of the tool holder 1, so as to drive the second inclined surface 121m to move down along the first inclined surface 11m to reduce the width of the mounting groove 11, thereby clamping the tool bar 21 in the mounting groove 11; similarly, when the fixing bolt 122 is rotated counterclockwise, the fixing bolt 122 can loosen the top plate 1211. After the top plate 1211 is loosened, the restriction on the tool bar 21 is released. At this time, the tool bar 21 can be easily taken out from the mounting groove 11 by moving the top plate 1211, or the tool bar 21 can be pulled directly along the length of the mounting groove 11.

[0072] It should be noted that, in addition to the above-mentioned structure, the fixing member 12 can also use other structures to lock the tool holder 21 onto the tool holder 1. Since there are many types of related structures and they are quite common in the mechanical field, this utility model does not impose any restrictions on them.

[0073] In the specification and claims of this application, the terms "comprising / including" and "having / including" and variations thereof are used to specify the presence of the stated features, values, steps or components, but do not exclude the presence or addition of one or more other features, values, steps, components or combinations thereof.

[0074] Some features of the present invention are described in different embodiments for clarity; however, these features may also be described in combination in a single embodiment. Conversely, some features of the present invention are described only in a single embodiment for brevity; however, these features may also be described individually or in any suitable combination in different embodiments.

[0075] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A quick-positioning tool changer for a lathe, comprising a tool holder (1), wherein the tool holder (1) is provided with a mounting groove (11) and a fixing member (12); characterized in that, It also includes a cutting tool (2), which includes a cutting bar (21) and a cutting head (22) mounted on the cutting bar (21), and the cutting tool (2) is provided with a positioning block (23) at the end of the cutting bar (21); wherein the cutting bar (21) is slidably engaged with the mounting groove (11), and the positioning block (23) can slide with the cutting bar (21) and abut against the side wall of the cutting tool holder (1) to limit the extension length of the cutting head (22), and the fixing member (12) is used to lock the cutting bar (21) in the mounting groove (11).

2. The quick positioning and tool changing structure for a lathe according to claim 1, characterized in that, The positioning block (23) is located at one end of the shank (21) near the cutting head (22), and the positioning block (23) is located on the back of the cutting head (22) away from the blade (24) mounted on the front of the cutting head (22).

3. The quick positioning tool changer for a lathe according to claim 2, characterized in that, The bottom surface of the cutter head (22) is provided with a chip removal groove (220), and the positioning block (23) is provided with a chip removal port (230) corresponding to the chip removal groove (220).

4. A quick-positioning tool changer for a lathe according to any one of claims 1-3, characterized in that, The positioning blocks (23) may have the same or different lengths on multiple cutting tools (2).

5. A quick-positioning tool changer for a lathe according to claim 4, characterized in that, The positioning block (23), the cutter bar (21), and the cutter head (22) are integrally formed.

6. The quick positioning and tool changing structure for a lathe according to claim 1, characterized in that, It also includes a pad (3) and an adjusting member (4). The pad (3) is provided with a slide rod (31). The positioning block (23) is provided with a slide groove (231) that opens toward the tool holder (1), and the slide groove (231) slides in cooperation with the slide rod (31). The adjusting member (4) is installed on the positioning block (23) and is used to drive the slide rod (31) to move along the slide groove (231) to adjust the relative distance between the pad (3) and the positioning block (23).

7. A quick-positioning tool changer for a lathe according to claim 6, characterized in that, The positioning block (23) has a hidden groove (232) at the opening of the slide groove (231). When the slide rod (31) moves inward along the slide groove (231), it can drive the pad block (3) to completely enter the hidden groove (232).

8. A quick-positioning tool changer for a lathe according to claim 6, characterized in that, The length of the pad (3) is fixed, the slide bar (31) is provided with a scale (31k), and the positioning block (23) is provided with an indicator (23k) corresponding to the scale (31k) on the side of the slide groove (231).

9. A quick-positioning tool changer for a lathe according to claim 6, characterized in that, The adjusting component (4) includes a rack (41), a gear (42), and an adjusting bolt (43); the rack (41) is mounted on the slide rod (31) and extends along the length of the slide rod (31); the gear (42) is disposed in the slide groove (231) and meshes with the rack (41); the adjusting bolt (43) is rotatably mounted on the positioning block (23), and one end of the adjusting bolt (43) passes through the slide groove (231) and is fixed to the gear (42). Rotating the adjusting bolt (43) can drive the slide rod (31) to move along the slide groove (231).

10. A quick-positioning tool changer for a lathe according to claim 1, characterized in that, The top of the tool holder (1) is provided with a plurality of screw holes (13) on the side of the mounting groove (11), and the inner wall of the mounting groove (11) is provided with a first inclined surface (11m); the fastener (12) includes a right angle plate (121) and a fixing bolt (122). The right angle plate (121) is composed of a top plate (1211) and a vertical plate (1212), and the top plate (1211) is parallel to the top of the tool holder (1). The vertical plate (1212) extends into the mounting groove (11), and the inner wall of the vertical plate (1212) is provided with a second inclined surface (121m) that fits the first inclined surface (11m). The fixing bolt (122) is designed with multiple screw holes (13). One end of the fixing bolt (122) passes through the top plate (1211) and is threaded to the corresponding screw hole (13). Rotating the fixing bolt (122) can drive the top plate (1211) to move closer to the top of the tool holder (1), thereby driving the second inclined surface (121m) to move along the first inclined surface (11m) to reduce the width of the mounting groove (11) and thus clamp the tool bar (21) in the mounting groove (11).

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