Universal type machining center auxiliary tool setting tool

Abstract

The utility model discloses a universal auxiliary tool setting tool for a machining center, which comprises a supporting seat with an inverted T-shaped cross section, and the vertical bottom of the supporting seat can be fastened on a base of the machining center. The device further comprises a fixing block, the fixing block comprises a fixing block body, the bottom of the longitudinal rear end of the fixing block body is integrally connected with the top of the supporting seat, a lining installation cavity is formed in the bottom, close to the front end, of the fixing block body in the vertical direction, a lining is coaxially arranged in the lining installation cavity, and a fixing rod of the dial indicator is coaxially sleeved with the lining. The axial lower end of the fixing rod is arranged upwards in the vertical direction. A dial indicator fastening screw hole is formed in the front end of the fixing block body in the longitudinal direction, and the longitudinal rear end of the dial indicator fastening screw hole is communicated with the lining installation cavity. A dial indicator fastening screw is installed in the dial indicator fastening screw hole, and the dial indicator fastening screw can fasten the fixing rod by extruding the side wall of the lining. The tool setting device is simple and reliable in structure, coordinates of the tool setting position in the vertical direction are confirmed through the dial indicator, and tool changing errors are reduced.

Description

Technical Field

[0001] This utility model belongs to the field of machining technology, and relates to tool setting, specifically to a general-purpose auxiliary tool setting fixture for machining centers. Background Technology

[0002] Machining centers are widely used equipment in the machining industry, typically for processes such as drilling and milling. Depending on the specific machining process, the types and lifespans of the cutting tools used vary considerably. While some existing machines are equipped with automatic tool setting devices, a large number still rely on traditional trial cuts for tool setting. During debugging and tool changing, the tool's installation position coordinates are determined using off-line tool setters, vernier calipers, visual inspection, and trial cuts. This method results in significant tool changing errors and low efficiency. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a general-purpose auxiliary tool setting fixture for machining centers, so as to solve the technical problem that it is difficult to reduce errors and improve efficiency during tool installation in the debugging and tool changing process of the existing technology.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A general-purpose machining center auxiliary tool setting fixture includes a support base with an inverted T-shaped cross-section, the vertical bottom of which can be fastened to the base of the machining center.

[0006] It also includes a fixing block, which includes a fixing block body. The vertical bottom of the longitudinal rear end of the fixing block body is integrally connected to the vertical top of the support base. A bushing mounting cavity is also provided on the vertical bottom of the fixing block body near the longitudinal front end. Both vertical ends of the bushing mounting cavity are open. A bushing is coaxially arranged in the bushing mounting cavity. The fixing rod of the dial indicator is coaxially mounted in the bushing. The axial lower end of the fixing rod of the dial indicator is arranged vertically upward.

[0007] The longitudinal front end of the fixed block body is provided with a dial indicator fastening screw hole, and the longitudinal rear end of the dial indicator fastening screw hole is connected to the bushing mounting cavity; a dial indicator fastening screw is also installed in the dial indicator fastening screw, which can fasten the dial indicator fixing rod by squeezing the side wall of the bushing.

[0008] The fixed block body has a vertically oriented locating pin mounting cavity with both ends open, and a locating pin is arranged vertically inside the locating pin mounting cavity; the axial bottom of the locating pin can always contact the measuring end of the dial indicator's measuring rod during tool setting, and the axial top of the locating pin can be vertically pressed against the measuring end of the dial indicator's measuring rod by the vertical pressing of the tool.

[0009] This utility model also has the following technical features:

[0010] Specifically, the fixed block body has a spring mounting cavity with both ends open at the top vertically of the bushing mounting cavity. The bottom vertical of the spring mounting cavity is connected to the top vertical of the bushing mounting cavity. A compression spring is installed in the spring mounting cavity, and the measuring end of the dial indicator's measuring rod is also fitted inside the lower axial section of the compression spring.

[0011] The fixing block body also has a positioning pin mounting cavity with both ends open at the top vertically of the spring mounting cavity, and the bottom vertically of the positioning pin mounting cavity is connected to the top vertically of the spring mounting cavity.

[0012] Specifically, the diameters at both ends of the axial direction of the positioning pin are smaller than the diameter of the middle section of the axial direction of the positioning pin, the vertical height of the top of the axial direction of the positioning pin is greater than or equal to the vertical height of the upper surface of the fixing block body, and the bottom of the axial direction of the positioning pin is fitted into the upper section of the compression spring.

[0013] Specifically, the outer diameter of the compression spring is larger than the diameter of the bushing mounting cavity, and the outer diameter of the compression spring is less than or equal to the diameter of the axial middle section of the locating pin.

[0014] The inner diameter of the compression spring is greater than the measuring end diameter of the dial indicator's measuring rod, and the inner diameter of the compression spring is also greater than or equal to the axial bottom diameter of the locating pin.

[0015] The diameter of the axial bottom of the positioning pin is greater than or equal to the diameter of the measuring end of the dial indicator's measuring rod.

[0016] Specifically, the longitudinal front end of the fixed block body is provided with a travel limit screw mounting hole, and the longitudinal rear end of the travel limit screw mounting hole is connected to the positioning pin mounting cavity.

[0017] The travel limit screw mounting hole is also equipped with a locating pin travel limit screw.

[0018] The locating pin has a vertically formed locating pin travel groove on the outer surface of its axial middle section sidewall. Both ends of the locating pin travel groove are closed. The end of the locating pin travel limiting screw extends into the locating pin travel groove. The locating pin travel limiting screw can limit the vertical movement range of the locating pin through the locating pin travel groove.

[0019] Specifically, the maximum value of the vertical downward movement of the positioning pin through the positioning pin travel groove is greater than or equal to the maximum value of the vertical downward movement of the dial indicator's measuring rod.

[0020] Specifically, the bushing has a long notch that runs through the side wall, the long notch is arranged along the axial direction of the bushing, and the two ends of the long notch are open in the axial direction; the dial indicator fastening screw can fasten the dial indicator fixing rod by pressing against the side wall of the bushing.

[0021] Specifically, the support base includes a horizontal plate arranged laterally along the length direction, the center of the vertical top of the horizontal plate is integrally connected to the vertical bottom of a vertical plate arranged vertically along the length direction, and the vertical top of the vertical plate is integrally connected to the vertical bottom of the longitudinal rear end of the fixing block body.

[0022] The bottom center of the horizontal plate is provided with a T-shaped groove for mounting a limiting block, and both ends of the T-shaped groove for mounting a limiting block are closed. The upper half of the T-shaped groove limiting block is also provided in the T-shaped groove for mounting a limiting block, and the lower half of the T-shaped groove limiting block is fitted into the T-shaped groove of the machining center base.

[0023] The T-slot limiting block is also provided with multiple vertically penetrating first mounting holes for connecting bolts. These multiple vertically penetrating first mounting holes for connecting bolts are evenly distributed along the transverse direction, and a connecting bolt is installed in each first mounting hole for connecting bolts.

[0024] The horizontal plate is provided with multiple second mounting holes for connecting bolts along the bottom of the T-slot limiting block mounting groove. The second mounting holes for connecting bolts correspond one-to-one with the first mounting holes for connecting bolts. Each connecting bolt can install the T-slot limiting block onto the horizontal plate by passing through the first mounting hole and the second mounting hole for connecting bolts in sequence from bottom to top.

[0025] Specifically, the horizontal plate also has a vertically penetrating left-side T-slot bolt hole, which is located on the horizontal left side of the vertical plate. The left side of the left-side T-slot bolt hole is open, and a left-side T-slot bolt is installed inside the left-side T-slot bolt hole. The bolt head of the left-side T-slot bolt is located in the T-slot of the machining center base. A left-side hexagonal nut is also provided at the top vertically of the left-side T-slot bolt hole. The horizontal plate can be fastened to the machining center base by the left-side T-slot bolt and the left-side hexagonal nut.

[0026] The horizontal plate also has a vertically penetrating right-side T-slot bolt hole, which is located on the right side of the vertical plate. The right side of the right-side T-slot bolt hole is open, and a right-side T-slot bolt is installed inside the right-side T-slot bolt hole. The bolt head of the right-side T-slot bolt is located in the T-slot of the machining center base. A right-side hexagonal nut is also provided at the top vertically of the right-side T-slot bolt hole. The horizontal plate can be fastened to the machining center base by the right-side T-slot bolt and the right-side hexagonal nut.

[0027] Compared with the prior art, the present invention has the following beneficial technical effects:

[0028] (I) The device of this utility model has a simple and reliable structure. The tool setting position is confirmed in the vertical coordinate using a dial indicator, and the tool repeatability accuracy can reach ±0.003mm, further reducing tool changing error.

[0029] (II) The device of this utility model uses a positioning pin and a compression spring for tool setting, which makes the tool setting process more convenient and improves the tool changing efficiency.

[0030] (III) Compared with the tool setting fixtures in the prior art, the device of this utility model has a wider range of applications and can be applied to machining centers using a general-purpose T-slot base. Attached Figure Description

[0031] Figure 1 This is a longitudinal cross-sectional view of the device in this utility model.

[0032] Figure 2 This is a cross-sectional view of the horizontal plate in the device of this utility model.

[0033] Figure 3 This is a top view of the device in this utility model.

[0034] The meanings of the labels in the diagram are as follows: 1-Support base, 2-Machining center base, 3-Fixing block, 4-Bushing, 5-Dial indicator, 6-Dial indicator fastening screw, 7-Compression spring, 8-Locking pin, 9-Locking pin travel limit screw, 10-Locking pin travel groove, 11-Long notch, 12-T-slot limit block, 13-Machining center base T-slot, 14-Connecting bolt, 15-Left T-slot bolt, 16-Left hexagonal nut, 17-Right T-slot bolt, 18-Right hexagonal nut, 19-Cutting tool, 20-First mounting hole of connecting bolt.

[0035] 101 - Horizontal plate, 102 - Vertical plate.

[0036] 301-Fixing block body, 302-Bushing mounting cavity, 303-Dial indicator fastening screw hole, 304-Spring mounting cavity, 305-Positioning pin mounting cavity, 306-Travel limit screw mounting hole.

[0037] 501 - Fixed rod, 502 - Measuring rod.

[0038] 10101-T-slot limit block mounting slot, 10102-Second mounting hole for connecting bolt, 10103-Left T-slot bolt hole, 10104-Right T-slot bolt hole.

[0039] The specific content of this utility model will be further explained in detail below with reference to the embodiments. Detailed Implementation

[0040] It should be noted that, unless otherwise specified, all equipment and components in this utility model are based on existing technologies. For example, the machining center base is a known machining center base, the dial indicator is a known dial indicator, the bushing is a known bushing, the compression spring is a known compression spring, the cutting tool is a known cutting tool, and the machine tool CNC axis is a known machine tool CNC axis.

[0041] In this invention, the OXYZ coordinate system is a three-dimensional rectangular coordinate system, with the X-axis pointing horizontally to the right; the Y-axis pointing vertically to the rear; and the Z-axis pointing vertically upwards.

[0042] Following the above technical solution, the following are specific embodiments of this utility model. It should be noted that this utility model is not limited to the following specific embodiments, and all equivalent modifications made based on the technical solution of this application fall within the protection scope of this utility model.

[0043] Example:

[0044] This embodiment provides a general-purpose auxiliary tool setting fixture for machining centers, such as... Figure 1 As shown, it includes a support base 1 with an inverted T-shaped cross-section, and the vertical bottom of the support base 1 can be fastened to the machining center base 2.

[0045] like Figure 1 As shown, it also includes a fixing block 3, which includes a fixing block body 301. The vertical bottom of the longitudinal rear end of the fixing block body 301 is integrally connected to the vertical top of the support base 1. A bushing mounting cavity 302 is also provided on the vertical bottom of the fixing block body 301 near the longitudinal front end. Both vertical ends of the bushing mounting cavity 302 are open. A bushing 4 is coaxially arranged in the bushing mounting cavity 302. The fixing rod 501 of the dial indicator 5 is coaxially mounted in the bushing 4. The axial lower end of the fixing rod 501 of the dial indicator 5 is arranged vertically upward.

[0046] like Figure 1 As shown, a dial indicator fastening screw hole 303 is also provided on the longitudinal front end of the fixing block body 301 along the longitudinal direction. The longitudinal rear end of the dial indicator fastening screw hole 303 is connected to the bushing mounting cavity 302. A dial indicator fastening screw 6 is also installed in the dial indicator fastening screw hole 303. The dial indicator fastening screw 6 can fasten the fixing rod 501 of the dial indicator 5 by squeezing the side wall of the bushing 4.

[0047] like Figure 1As shown, the fixed block body 301 has a vertically opened positioning pin mounting cavity 305 with both ends open, and a positioning pin 8 is arranged vertically inside the positioning pin mounting cavity 305; the axial bottom of the positioning pin 8 can always contact the measuring end of the measuring rod 502 of the dial indicator 5 during tool setting, and the axial top of the positioning pin 8 can be vertically pressed against the measuring end of the measuring rod 502 of the dial indicator 5 by the vertical pressing of the tool 19.

[0048] In this embodiment, the dial indicator fastening screw 6 is a flat-tail screw.

[0049] In this embodiment, the bushing 4 can be deformed by compression, and the long notch 11 facilitates the deformation of the bushing 4 when it is compressed.

[0050] As a preferred embodiment of this invention, such as Figure 1 As shown, a spring mounting cavity 304 with both ends open is also provided on the vertical top of the bushing mounting cavity 302 along the vertical direction of the fixing block body 301. The vertical bottom of the spring mounting cavity 304 is connected to the vertical top of the bushing mounting cavity 302. A compression spring 7 is installed in the spring mounting cavity 304. The measuring end of the measuring rod 502 of the dial indicator 5 is also installed in the lower axial section of the compression spring 7.

[0051] like Figure 1 As shown, a positioning pin mounting cavity 305 with both ends open is also provided on the vertical top of the spring mounting cavity 304 along the vertical direction of the fixing block body 301. The vertical bottom of the positioning pin mounting cavity 305 is connected to the vertical top of the spring mounting cavity 304.

[0052] In this embodiment, the compression spring 7 is coaxially disposed within the spring mounting cavity 304.

[0053] In this embodiment, the compression spring 7 can cause the positioning pin 8 to return to its initial state.

[0054] As a preferred embodiment of this invention, such as Figure 1 As shown, the diameters of both ends of the locating pin 8 are smaller than the diameter of the middle section of the locating pin 8. The vertical height of the top of the locating pin 8 is greater than or equal to the vertical height of the upper surface of the fixing block body 301. The bottom of the locating pin 8 is fitted inside the upper section of the compression spring 7.

[0055] As a preferred embodiment, the outer diameter of the compression spring 7 is larger than the diameter of the bushing mounting cavity 302, and the outer diameter of the compression spring 7 is less than or equal to the diameter of the axial middle section of the positioning pin 8.

[0056] The inner diameter of the compression spring 7 is greater than the measuring end diameter of the measuring rod 502 of the dial indicator 5, and the inner diameter of the compression spring 7 is also greater than or equal to the axial bottom diameter of the locating pin 8.

[0057] The diameter of the axial bottom of the locating pin 8 is greater than or equal to the diameter of the measuring end of the measuring rod 502 of the dial indicator 5.

[0058] In this embodiment, the inner diameter of the compression spring 7 is also larger than the diameter of the axial bottom of the positioning pin 8.

[0059] As a preferred embodiment of this invention, such as Figure 1 As shown, the longitudinal front end of the fixed block body 301 is also provided with a travel limit screw mounting hole 306 along the longitudinal direction, and the longitudinal rear end of the travel limit screw mounting hole 306 is connected to the positioning pin mounting cavity 305.

[0060] like Figure 1 As shown, a locating pin travel limit screw 9 is also installed in the travel limit screw mounting hole 306.

[0061] like Figure 1 As shown, a positioning pin stroke groove 10 is also provided vertically on the outer surface of the side wall of the axial middle section of the positioning pin 8. Neither end of the positioning pin stroke groove 10 is open. The end of the positioning pin stroke limiting screw 9 extends into the positioning pin stroke groove 10. The positioning pin stroke limiting screw 9 can limit the vertical movement range of the positioning pin 8 through the positioning pin stroke groove 10.

[0062] In this embodiment, the positioning pin travel limit screw 9 is threaded into the travel limit screw mounting hole 306.

[0063] As a preferred embodiment, the maximum value of the vertical downward movement of the positioning pin 8 through the positioning pin travel groove 10 is greater than or equal to the maximum value of the vertical downward movement of the measuring rod 502 of the dial indicator 5.

[0064] As a preferred embodiment of this invention, such as Figure 1 As shown, a long notch 11 is also provided on the side wall of the bushing 4, which runs through the side wall. The long notch 11 is arranged along the axial direction of the bushing 4, and the two ends of the long notch 11 are open in the axial direction. The dial indicator fastening screw 6 can fasten the fixing rod 501 of the dial indicator 5 by pressing the side wall of the bushing 4.

[0065] In this embodiment, the dial indicator fastening screw 6 can also fasten the bushing 4 by pressing against the side wall of the bushing 4.

[0066] As a preferred embodiment of this invention, such as Figure 1 and Figure 2 As shown, the support base 1 includes a horizontal plate 101 arranged in the transverse direction along the length direction. The center of the vertical top of the horizontal plate 101 is also integrally connected to the vertical bottom of the vertical plate 102 arranged in the vertical direction along the length direction. The vertical top of the vertical plate 102 is also integrally connected to the vertical bottom of the longitudinal rear end of the fixing block body 301.

[0067] like Figure 1 and Figure 2 As shown, a T-slot limiting block mounting groove 10101 is also provided at the bottom center of the horizontal plate 101 along the horizontal direction. Both ends of the T-slot limiting block mounting groove 10101 are not open. The upper half of the T-slot limiting block 12 is also provided in the T-slot limiting block mounting groove 10101. The lower half of the T-slot limiting block 12 is fitted into the machining center base T-slot 13 on the machining center base 2.

[0068] like Figure 1 and Figure 2 As shown, the T-slot limiting block 12 is also provided with multiple vertically penetrating first mounting holes 20 for connecting bolts. The multiple vertically penetrating first mounting holes 20 for connecting bolts are evenly distributed in the transverse direction, and a connecting bolt 14 is installed in each first mounting hole 20 for connecting bolts.

[0069] like Figure 1 and Figure 2 As shown, multiple second mounting holes 10102 for connecting bolts are also vertically upward along the bottom edge of the T-slot limiting block mounting groove 10101 on the horizontal plate 101. The second mounting holes 10102 for connecting bolts correspond one-to-one with the first mounting holes 20 for connecting bolts. Each connecting bolt 14 can install the T-slot limiting block 12 onto the horizontal plate 101 vertically from bottom to top through the first mounting hole 20 and the second mounting hole 10102 for connecting bolts.

[0070] As a preferred embodiment of this invention, such as Figure 3 As shown, a vertically penetrating left-side T-slot bolt hole 10103 is also provided on the horizontal plate 101. The left-side T-slot bolt hole 10103 is located on the horizontal left side of the vertical plate 102. The left side of the left-side T-slot bolt hole 10103 is open, and a left-side T-slot bolt 15 is installed inside the left-side T-slot bolt hole 10103. The bolt head of the left-side T-slot bolt 15 is located in the T-slot 13 of the machining center base. A left-side hexagonal nut 16 is also provided at the vertical top of the left-side T-slot bolt hole 10103. The horizontal plate 101 can be fastened to the machining center base 2 by the left-side T-slot bolt 15 and the left-side hexagonal nut 16.

[0071] like Figure 3As shown, a vertically penetrating right-side T-slot bolt hole 10104 is also provided on the horizontal plate 101. The right-side T-slot bolt hole 10104 is located on the horizontal right side of the vertical plate 102. The right side of the right-side T-slot bolt hole 10104 is open, and a right-side T-slot bolt 17 is installed inside the right-side T-slot bolt hole 10104. The bolt head of the right-side T-slot bolt 17 is located in the T-slot 13 of the machining center base. A right-side hexagonal nut 18 is also provided at the vertical top of the right-side T-slot bolt hole 10104. The horizontal plate 101 can be fastened to the machining center base 2 by the right-side T-slot bolt 17 and the right-side hexagonal nut 18.

[0072] In this embodiment, during use, the measuring end of the measuring rod 502 of the dial indicator 5 contacts the lower end face of the positioning pin 8, and the tool 19 pushes the positioning pin 8 to make the pointer of the dial indicator 5 swing, so as to confirm the vertical position coordinates of the tool 19.

[0073] The device in this embodiment specifically includes the following steps when in use:

[0074] Step 1: Install the T-slot limiting block 12 onto the T-slot limiting block mounting slot 10101 on the horizontal plate 101 using connecting bolts 14.

[0075] Step 2: Use the left T-slot bolt 15 and the left hex nut 16 to install the left side of the horizontal plate 101 onto the machining center base 2; use the right T-slot bolt 17 and the right hex nut 18 to install the right side of the horizontal plate 101 onto the machining center base 2.

[0076] Step 3: Place the compression spring 7 onto the positioning pin 8 and install the compression spring 7 into the spring mounting cavity 304. Install the positioning pin 8 into the positioning pin mounting cavity 305. At the same time, use the positioning pin travel limit screw 9 to limit the vertical movement range of the positioning pin 8.

[0077] Step 4: Install bushing 4 onto the fixing rod 501 of dial indicator 5.

[0078] Step 5: Insert the bushing 4 and the fixing rod 501 of the dial indicator 5 into the bushing mounting cavity 302, adjust the height of the dial indicator 5 so that the pointer of the dial indicator 5 is within the effective measurement range, and use the dial indicator fastening screw 6 to tighten the fixing rod 501 of the dial indicator 5 by pressing against the side wall of the bushing 4.

[0079] Step six, during tool change, after the new tool 19 is installed, move the CNC axis of the machine tool so that the tool 19 contacts the top of the locating pin 8. Under the vertical push of the tool 19, the locating pin 8 moves vertically downward until the pointer of the dial indicator 5 swings to the required position, thus completing the tool setting.

Claims

1. A general-purpose auxiliary tool setting fixture for machining centers, characterized in that, Includes a support base (1) with an inverted T-shaped cross-section, the vertical bottom of which can be fastened to the machining center base (2); It also includes a fixing block (3), which includes a fixing block body (301). The vertical bottom of the longitudinal rear end of the fixing block body (301) is integrally connected with the vertical top of the support base (1). A bushing mounting cavity (302) is also provided on the vertical bottom of the fixing block body (301) near the longitudinal front end. Both vertical ends of the bushing mounting cavity (302) are open. A bushing (4) is coaxially arranged in the bushing mounting cavity (302). The fixing rod (501) of the dial indicator (5) is coaxially mounted in the bushing (4). The lower axial end of the fixing rod (501) of the dial indicator (5) is arranged vertically upward. The longitudinal front end of the fixed block body (301) is provided with a dial indicator fastening screw hole (303) along the longitudinal direction, and the longitudinal rear end of the dial indicator fastening screw hole (303) is connected to the bushing mounting cavity (302); a dial indicator fastening screw (6) is also installed in the dial indicator fastening screw hole (303), and the dial indicator fastening screw (6) can fasten the fixing rod (501) of the dial indicator (5) by squeezing the side wall of the bushing (4); The fixed block body (301) has a positioning pin mounting cavity (305) with both ends open along the vertical direction. A positioning pin (8) is arranged vertically inside the positioning pin mounting cavity (305). The bottom of the positioning pin (8) can always contact the measuring end of the measuring rod (502) of the dial indicator (5) during tool setting. The top of the positioning pin (8) can be vertically pressed against the measuring end of the measuring rod (502) of the dial indicator (5) by the vertical pressing of the tool (19).

2. The general-purpose machining center auxiliary tool setting fixture as described in claim 1, characterized in that, The fixed block body (301) is provided with a spring mounting cavity (304) with both ends open at the top vertical of the bushing mounting cavity (302). The bottom vertical of the spring mounting cavity (304) is connected to the top vertical of the bushing mounting cavity (302). A compression spring (7) is installed in the spring mounting cavity (304). The measuring end of the measuring rod (502) of the dial indicator (5) is also installed in the lower axial section of the compression spring (7). The fixing block body (301) also has a positioning pin mounting cavity (305) with both ends open at the top vertical of the spring mounting cavity (304), and the bottom vertical of the positioning pin mounting cavity (305) is connected to the top vertical of the spring mounting cavity (304).

3. The general-purpose machining center auxiliary tool setting fixture as described in claim 2, characterized in that, The diameters at both ends of the axial direction of the positioning pin (8) are smaller than the diameter of the middle section of the axial direction of the positioning pin (8). The vertical height of the top of the axial direction of the positioning pin (8) is greater than or equal to the vertical height of the upper surface of the fixing block body (301). The bottom of the axial direction of the positioning pin (8) is fitted inside the upper section of the compression spring (7).

4. The general-purpose machining center auxiliary tool setting fixture as described in claim 3, characterized in that, The outer diameter of the compression spring (7) is greater than the diameter of the bushing mounting cavity (302), and the outer diameter of the compression spring (7) is less than or equal to the diameter of the axial middle section of the positioning pin (8). The inner diameter of the compression spring (7) is greater than the measuring end diameter of the measuring rod (502) of the dial indicator (5), and the inner diameter of the compression spring (7) is also greater than or equal to the diameter of the axial bottom of the positioning pin (8). The diameter of the axial bottom of the positioning pin (8) is greater than or equal to the diameter of the measuring end of the measuring rod (502) of the dial indicator (5).

5. The general-purpose machining center auxiliary tool setting fixture as described in claim 3, characterized in that, The longitudinal front end of the fixed block body (301) is provided with a travel limit screw mounting hole (306) along the longitudinal direction, and the longitudinal rear end of the travel limit screw mounting hole (306) is connected to the positioning pin mounting cavity (305). The travel limit screw mounting hole (306) is also equipped with a positioning pin travel limit screw (9); The locating pin (8) has a locating pin stroke groove (10) on the outer surface of the side wall of the axial middle section. Both ends of the locating pin stroke groove (10) are closed. The end of the locating pin stroke limiting screw (9) extends into the locating pin stroke groove (10). The locating pin stroke limiting screw (9) can limit the vertical movement range of the locating pin (8) through the locating pin stroke groove (10).

6. The general-purpose machining center auxiliary tool setting fixture as described in claim 5, characterized in that, The maximum value of the vertical downward movement of the positioning pin (8) through the positioning pin travel groove (10) is greater than or equal to the maximum value of the vertical downward movement of the measuring rod (502) of the dial indicator (5).

7. The general-purpose machining center auxiliary tool setting fixture as described in claim 1, characterized in that, The bushing (4) is also provided with a long notch (11) that runs through the side wall. The long notch (11) is arranged along the axial direction of the bushing (4) and the two ends of the long notch (11) are open in the axial direction. The dial indicator fastening screw (6) can fasten the fixing rod (501) of the dial indicator (5) by squeezing the side wall of the bushing (4).

8. The general-purpose machining center auxiliary tool setting fixture as described in claim 1, characterized in that, The support base (1) includes a horizontal plate (101) arranged in the transverse direction along the length direction. The center of the vertical top of the horizontal plate (101) is also integrally connected to the vertical bottom of the vertical plate (102) arranged in the vertical direction along the length direction. The vertical top of the vertical plate (102) is also integrally connected to the vertical bottom of the longitudinal rear end of the fixing block body (301). The bottom center of the horizontal plate (101) is provided with a T-shaped groove limiting block mounting groove (10101) along the horizontal direction. Both ends of the T-shaped groove limiting block mounting groove (10101) are not open. The upper half of the T-shaped groove limiting block (12) is also provided in the T-shaped groove limiting block mounting groove (10101). The lower half of the T-shaped groove limiting block (12) is fitted into the machining center base T-shaped groove (13) on the machining center base (2). The T-slot limiting block (12) is also provided with multiple vertically penetrating first mounting holes (20) for connecting bolts. The multiple vertically penetrating first mounting holes (20) for connecting bolts are evenly arranged in the transverse direction. Each first mounting hole (20) for connecting bolts is equipped with a connecting bolt (14). On the horizontal plate (101), a plurality of second mounting holes (10102) for connecting bolts are also provided vertically upward along the bottom of the T-slot limiting block mounting groove (10101). The second mounting holes (10102) for connecting bolts correspond one-to-one with the first mounting holes (20) for connecting bolts. Each connecting bolt (14) can install the T-slot limiting block (12) onto the horizontal plate (101) in a vertical direction from bottom to top through the first mounting hole (20) for connecting bolts and the second mounting hole (10102) for connecting bolts.

9. The general-purpose machining center auxiliary tool setting fixture as described in claim 1, characterized in that, The horizontal plate (101) is also provided with a vertically penetrating left T-slot bolt hole (10103), which is located on the horizontal left side of the vertical plate (102). The left side of the left T-slot bolt hole (10103) is open, and a left T-slot bolt (15) is installed inside the left T-slot bolt hole (10103). The bolt head of the left T-slot bolt (15) is located in the T-slot (13) of the machining center base. A left hexagonal nut (16) is also provided at the top vertical of the left T-slot bolt hole (10103). The horizontal plate (101) can be fastened to the machining center base (2) by the left T-slot bolt (15) and the left hexagonal nut (16). The horizontal plate (101) is also provided with a vertically penetrating right-side T-slot bolt hole (10104), which is located on the right side of the vertical plate (102). The right side of the right-side T-slot bolt hole (10104) is open, and a right-side T-slot bolt (17) is installed inside the right-side T-slot bolt hole (10104). The bolt head of the right-side T-slot bolt (17) is located in the T-slot (13) of the machining center base. A right-side hexagonal nut (18) is also provided at the top vertical of the right-side T-slot bolt hole (10104). The horizontal plate (101) can be fastened to the machining center base (2) by the right-side T-slot bolt (17) and the right-side hexagonal nut (18).

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