Reusable pin hole type numerical control milling machine zero point positioning clamp

Abstract

The utility model discloses a reusable pin hole type numerical control milling machine zero point positioning clamp which comprises a clamp plate and a positioning assembly, the clamp plate is provided with a machining table top used for installation of a workpiece, and the machining table top is provided with an installation groove and a plurality of installation holes. The positioning assembly comprises a positioning strip, a first positioning piece and a positioning sleeve, the positioning strip is arranged in the mounting groove and detachably connected with the clamp plate, a first positioning hole is formed in the positioning strip in the depth direction of the mounting groove in an extending mode, the positioning sleeve is detachably mounted in the first positioning hole, and the first positioning piece is inserted into the positioning sleeve; and a part of the first positioning piece extends out of the machining table top from the interior of the mounting groove, and the first positioning piece is used for positioning the workpiece. The zero-point positioning fixture can solve the problem that the service life of a positioning strip is short due to the fact that a positioning hole formed in the positioning strip in an existing reusable pin hole type numerical control milling machine zero-point positioning fixture is prone to abrasion.

Description

Technical Field

[0001] The utility model relates to the field of positioning fixtures, in particular to a reusable pin-hole type zero-point positioning fixture for a numerically controlled milling machine. Background Art

[0002] The CNC milling machine positioning fixture is a process device used to quickly fasten the workpiece during processing to keep the machine tool, tool and workpiece in the correct relative position. However, the existing CNC milling machine positioning fixture relies on the positioning hole to position the positioning part during use, so the positioning hole will be worn to a certain extent during use. When the positioning hole is severely worn, a new positioning part needs to be reprocessed, which makes the service life of the existing CNC milling machine positioning fixture short. Utility Model Content

[0003] The main purpose of the utility model is to provide a reusable pin hole type CNC milling machine zero point positioning fixture, aiming to solve the problem that the positioning holes opened on the positioning bar in the existing reusable pin hole type CNC milling machine zero point positioning fixture are easy to wear, resulting in a short service life of the positioning bar.

[0004] To achieve the above-mentioned purpose, the utility model proposes a reusable pin-hole type CNC milling machine zero-point positioning fixture, comprising:

[0005] A fixture plate having a processing table surface for mounting a workpiece, wherein the processing table surface is provided with a mounting groove and a plurality of mounting holes; and

[0006] A positioning assembly includes a positioning strip, a first positioning piece and a positioning sleeve. The positioning strip is arranged in the mounting groove and is detachably connected to the fixture plate. A first positioning hole is extended on the positioning strip along the depth direction of the mounting groove. The positioning sleeve is detachably installed in the first positioning hole. The positioning sleeve is used for inserting the first positioning piece. A portion of the first positioning piece extends from the mounting groove to the outside of the processing table. The first positioning piece is used to position the workpiece.

[0007] In one embodiment, a second positioning hole is provided on the side of the positioning strip, and the second positioning hole is connected to the first positioning hole. The positioning assembly also includes a second positioning piece, and the second positioning piece is detachably arranged in the second positioning hole. A limiting portion is provided on the positioning sleeve, and one end of the second positioning piece is limitedly matched with the limiting portion.

[0008] In one embodiment, the limiting portion includes a limiting groove provided on the outer peripheral wall of the positioning sleeve, and one end of the second positioning member is inserted into the limiting groove.

[0009] In one embodiment, there are a plurality of the first positioning holes, and the plurality of the first positioning holes are sequentially spaced apart along the length direction of the positioning strip, and each of the first positioning holes is used for installing a positioning sleeve.

[0010] In one embodiment, there are multiple second positioning holes, the multiple second positioning holes are arranged in sequence along the length direction of the positioning strip, the multiple second positioning holes are connected to the multiple first positioning holes one by one, and the second positioning holes are extended along the width direction of the positioning strip.

[0011] In one embodiment, the first positioning member includes a first latch and a second latch, the first latch being detachably disposed in a first positioning hole of the positioning bar near its end, the first latch being used to locate the zero point of the workpiece, and the second latch being spaced apart from the first latch and detachably disposed in another of the first positioning holes.

[0012] In one embodiment, the positioning strip is provided with a third positioning hole at both ends along its length direction, and a fourth positioning hole is provided on the positioning strip. The positioning assembly also includes a positioning column and a first connecting piece. The positioning column is located at both ends of the mounting groove. The positioning column is arranged in the third positioning hole and inserted into the positioning groove at the bottom of the mounting groove. The first connecting piece is passed through the fourth positioning hole and connected to the bottom of the mounting groove.

[0013] In one embodiment, a boss is provided on the inner side of the first positioning hole, and the boss is used to receive the positioning sleeve.

[0014] In one embodiment, cutting grooves are provided at both ends of the installation groove, the bottom wall height of the cutting groove is lower than the bottom wall height of the installation groove, the cutting groove and the bottom wall of the positioning strip are combined to form a disassembly groove, and the notch of the disassembly groove is arranged outward.

[0015] In one embodiment, the reusable pin-hole type CNC milling machine zero-point positioning fixture also includes a plurality of pads, and the plurality of pads are arranged under the fixture plate. The pads are provided with a first connecting hole and a second connecting hole. The positioning assembly also includes a second connecting member and a third connecting member. The second connecting member is arranged on the fixture plate and extends into the first connecting hole to connect the fixture plate with the pads. The third connecting member is passed through the second connecting hole for connection with an external mounting table.

[0016] The technical solution of the utility model adopts a positioning strip that is detachably installed on the clamp plate, a first positioning hole is formed on the positioning strip, a positioning sleeve is inserted into the first positioning hole, and the positioning sleeve is connected with the positioning piece. When the positioning sleeve is worn and needs to be replaced, it is only necessary to remove the positioning strip from the clamp plate, and then remove the positioning sleeve from the first positioning hole for replacement, without replacing the entire positioning strip, thereby achieving the effect of prolonging the service life of the first positioning hole on the positioning strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of the zero-point positioning fixture and workpiece installation of the reusable pin-hole type CNC milling machine of the utility model;

[0019] Figure 2 It is a structural schematic diagram of the utility model of the reusable pin-hole type CNC milling machine zero-point positioning fixture for removing a workpiece;

[0020] Figure 3 for Figure 2 Schematic diagram of the exploded structure of the reusable pin-hole type CNC milling machine zero-point positioning fixture;

[0021] Figure 4 for Figure 3 A schematic diagram of the structure of the middle positioning strip;

[0022] Figure 5 for Figure 4 A schematic diagram of the structure of the middle positioning bar A-A section;

[0023] Figure 6 for Figure 3 A schematic diagram of the structure of the middle positioning bar from another perspective;

[0024] Figure 7 for Figure 3 Schematic diagram of the structure of the middle fixture plate;

[0025] Figure 8 for Figure 3 Schematic diagram of the structure of the positioning sleeve.

[0026] Description of Figure Numbers:

[0027]

[0028]

[0029] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0032] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if the meaning of "and / or" appearing in the full text is to include three parallel schemes, taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0033] The utility model proposes a reusable pin-hole type CNC milling machine zero-point positioning fixture 100, which includes a fixture plate 110 and a positioning assembly. The fixture plate 110 has a processing table for mounting a workpiece 200, and a mounting groove 112 and a plurality of mounting holes 111 are provided on the processing table. The positioning assembly includes a positioning bar 120, a first positioning member 130 and a positioning sleeve 140. The positioning bar 120 is arranged in the mounting groove 112 and is detachably connected to the fixture plate 110. The positioning bar 120 is provided with a first positioning hole 121 extending along the depth direction of the mounting groove 112. The positioning sleeve 140 is detachably installed in the first positioning hole 121. The positioning sleeve 140 is used for the first positioning member 130 to be inserted. A part of the first positioning member 130 extends from the mounting groove 112 to the outside of the processing table. The first positioning member 130 is used to position the workpiece 200.

[0034] In order to facilitate the understanding of the present technical solution, the “reusable pin-hole type CNC milling machine zero-point positioning fixture 100” will be replaced by the abbreviation “pin-hole type positioning fixture 100” for explanation and introduction in the following text.

[0035] It can be understood that the pin hole type positioning fixture 100 can be made of stainless steel or aluminum alloy, and the specific material is not limited here. Such a configuration makes the pin hole type positioning fixture 100 have a good load-bearing capacity, and avoids the pin hole type positioning fixture 100 being crushed by heavy objects when installing objects with large gravity. The fixture plate 110 can be set in a square body, or a disc, or other shapes. In this embodiment, if Figure 1 As shown in FIG. 3 , the fixture plate 110 is arranged in a square shape, the positioning strip 120 is arranged in the mounting groove 112, and the surface of the positioning strip 120 is flush with the fixture plate 110, so that the workpiece 200 can be installed flatly on the mounting plate surface. Furthermore, the first positioning hole 121 on the positioning strip 120 extends along the depth direction of the mounting groove 112. Such an arrangement enables the first positioning member 130 to be inserted into the first positioning hole 121, and part of the first positioning member 130 extends from the mounting groove 112 to the outside of the processing table, so that when the workpiece 200 is processed later, the workpiece 200 can be positioned at the current position for processing by relying on the first positioning member 130, thereby achieving the effect of positioning the workpiece 200.

[0036] In order to prevent the workpiece 200 from shaking after being installed on the processing table, a plurality of mounting holes 111 are opened on the fixture plate 110. Before processing the workpiece 200, a screw connector can be used to pass through the workpiece 200 and threadedly connected with the corresponding mounting holes 111, so that the workpiece 200 can be stably fixed on the fixture plate 110, thereby preventing the workpiece 200 from falling off due to shaking during processing, thereby affecting the quality and efficiency of processing the workpiece 200.

[0037] Specifically, since the first positioning hole 121 will be worn after being used for a long time with the first positioning member 130, resulting in a loss of positioning accuracy, in the prior art, the solution to this problem is to replace the entire positioning sleeve 140 or the fixture plate 110. In this embodiment, in order to solve this technical problem, Figure 1 As shown in Figure 3, the positioning assembly includes a positioning strip 120, a first positioning hole 121 and a positioning sleeve 140. The first positioning hole 121 extends along the depth direction of the mounting groove 112 and is opened on the positioning strip 120, while the positioning sleeve 140 is inserted in the first positioning hole 121. Since the positioning sleeve 140 is arranged in the first positioning hole 121, and the first positioning member 130 is inserted in the positioning sleeve 140, when wear occurs, it is the positioning sleeve 140 that suffers wear. When it needs to be replaced, it is only necessary to take out the positioning sleeve 140 from the inner side of the first positioning hole 121 for replacement, without replacing the entire positioning strip 120. Through the above arrangement, the overall service life of the positioning strip 120 and the first positioning member 130 is greatly improved.

[0038] The technical solution of the utility model is to install the positioning strip 120 detachably on the fixture plate 110, open a first positioning hole 121 on the positioning strip 120, insert a positioning sleeve 140 in the first positioning hole 121, and connect the positioning sleeve 140 with the positioning piece. When the positioning sleeve 140 is worn and needs to be replaced, it is only necessary to remove the positioning strip 120 from the fixture plate 110, and then remove the positioning sleeve 140 from the first positioning hole 121 for replacement. There is no need to replace the entire positioning strip 120, thereby achieving the effect of increasing the service life of the first positioning hole 121 on the positioning strip 120, and then indirectly increasing the service life of the positioning strip.

[0039] In another embodiment, if Figure 4As shown in Figure 6, a second positioning hole 122 is provided on the side of the positioning strip 120, and the second positioning hole 122 is connected to the first positioning hole 121. The positioning assembly also includes a second positioning member 150, and the second positioning member 150 is detachably arranged in the second positioning hole 122. A limiting portion is provided on the positioning sleeve 140, and one end of the second positioning member 150 is limitedly matched with the limiting portion. In order to further improve the connection stability between the positioning sleeve 140 and the first positioning hole 121, a second positioning hole 122 is opened on the side of the positioning strip 120, and the second positioning hole 122 is connected to the first positioning hole 121. Since the positioning assembly also includes a second positioning member 150, the second positioning member 150 is detachably arranged in the second positioning hole 122. Since a limiting portion is arranged on the positioning sleeve 140, when the second positioning member 150 is installed in the second positioning hole 122, one end of the second positioning member 150 facing the first positioning hole 121 is limitedly matched with the limiting portion of the positioning sleeve 140, so that the positioning sleeve 140 is more firmly installed in the first positioning hole 121.

[0040] Specifically, Figure 8 As shown, the limiting portion includes a limiting groove 1401 provided on the outer peripheral wall of the positioning sleeve 140, and one end of the second positioning member 150 is inserted into the limiting groove 1401. The limiting portion includes a limiting groove 1401 provided on the outer peripheral wall of the positioning sleeve 140. When the positioning sleeve 140 is inserted into the first positioning hole 121, the limiting groove 1401 provided on the positioning sleeve 140 is plugged with one end of the second positioning member 150. Since the second positioning member 150 is detachably installed in the second positioning hole 122, and one end is plugged with the limiting groove 1401, the limiting groove 1401 is limited by the plugging of the second positioning member 150, so that the positioning sleeve 140 is more stably arranged in the first positioning hole 121 for use with the first positioning member 130.

[0041] In another embodiment, if Figure 1 As shown in FIG. 6 , there are multiple first positioning holes 121, and the multiple first positioning holes 121 are sequentially arranged at intervals along the length direction of the positioning bar 120, and each first positioning hole 121 is used for installing a positioning sleeve 140. In order to improve the operability of the pin hole type positioning fixture 100, multiple first positioning holes 121 are provided on the positioning bar 120, and the multiple first positioning holes 121 are sequentially arranged at intervals along the length direction of the positioning bar 120. In order to further improve the service life of the multiple first positioning holes 121 on the positioning bar 120, replaceable positioning sleeves 140 are provided inside the multiple first positioning holes 121.

[0042] Specifically, there are multiple second positioning holes 122, which are arranged in sequence along the length direction of the positioning bar 120, and are connected to the multiple first positioning holes 121 one by one. The second positioning holes 122 are extended along the width direction of the positioning bar 120. Figure 6 As shown, since there are multiple first positioning holes 121 and positioning sleeves 140 are provided in the multiple first positioning holes 121, in order to stably arrange the positioning sleeves 140 in each positioning hole, multiple second positioning holes 122 are opened on the side of the positioning bar 120, and the multiple second positioning holes 122 are arranged in sequence and spaced apart along the length direction of the positioning bar 120, the multiple second positioning holes 122 are connected to the multiple first positioning holes 121 one by one, and the second positioning holes 122 are extended along the width direction of the positioning bar 120 to be connected with the first positioning holes 121. The specific installation method refers to the above embodiment.

[0043] In one embodiment, if Figure 2 and Figure 4 As shown, the first positioning member 130 includes a first pin 131 and a second pin 132. The first pin 131 is detachably disposed in a first positioning hole 121 near the end of the positioning bar 120. The first pin 131 is used to zero-point position the workpiece 200. The second pin 132 is spaced apart from the first pin 131 and is detachably disposed in another first positioning hole 121. In this embodiment, the first positioning member 130 includes a first pin 131 and a second pin 132, and the first pin 131 and the second pin 132 are both detachably installed in the first positioning hole 121. Since the first positioning holes 121 are arranged in sequence along the length direction of the positioning bar 120, a processing coordinate system is formed. Since the first pin 131 is inserted in the first positioning hole 121 near the end of the positioning bar 120, the first pin 131 is used as the zero point in the processing coordinate system, that is, the origin, for zero-point positioning of the workpiece 200. In order to further improve the positioning stability of the first positioning member 130 on the workpiece 200, the second pin 132 is inserted into another first positioning hole 121 at intervals from the first pin 131, and cooperates with the first pin 131 to position the workpiece 200.

[0044] In one embodiment, in order to make the positioning bar 120 more quickly and conveniently installed in the installation slot 112, as shown in FIG. Figure 6 and Figure 7As shown, the positioning bar 120 is respectively provided with a third positioning hole 123 at both ends along its length direction, and a fourth positioning hole 124 is provided on the positioning bar 120. The positioning assembly also includes a positioning column 1122 and a first connecting member 160. The positioning column 1122 is located at both ends of the mounting groove 112. The positioning column 1122 is arranged in the third positioning hole 123 and inserted into the positioning groove at the bottom of the mounting groove 112. The first connecting member 160 is passed through the fourth positioning hole 124 and connected to the bottom of the mounting groove 112. In this embodiment, third positioning holes 123 are provided at both ends of the positioning strip 120, and positioning posts 1122 are provided at both ends of the mounting groove 112 protruding toward the groove opening of the mounting groove 112. When the positioning strip 120 is installed in the mounting groove 112, the positioning posts 1122 pass through the third positioning holes 123. In order to further strengthen the connection strength of the positioning strip 120 installed in the mounting groove 112, fourth positioning holes 124 are provided on the positioning strip 120 at intervals along the length direction. During installation, the first connecting member 160 can be used to pass through the fourth positioning hole 124 and the bottom of the mounting groove 112 to achieve a fixed connection. In the above manner, the positioning strip 120 and the mounting groove 112 are more convenient to install and have a better positioning effect. The first connecting member 160 can be a fixing bolt.

[0045] In another embodiment, if Figure 5 and Figure 6 As shown, a boss 1211 is provided on the inner side of the first positioning hole 121, and the boss 1211 is used to receive the positioning sleeve 140. In order to make it more convenient for the positioning sleeve 140 to be installed in the first positioning hole 121 and plugged with the second positioning member 150, a boss 1211 is provided at one end of the first positioning hole 121 close to the bottom of the installation groove 112, and the boss 1211 is used to receive the positioning sleeve 140. When the positioning sleeve 140 is inserted into the first positioning hole 121, the positioning sleeve 140 will be received in the first positioning hole 121 due to the setting of the boss 1211, so that the limiting groove 1401 provided on the positioning sleeve 140 can be better plugged with the second positioning member 150 inserted through the second positioning hole 122. The above setting makes it more convenient for the positioning sleeve 140 to be installed in the first positioning hole 121.

[0046] In order to facilitate the removal of the positioning bar 120 from the mounting groove 112 later, in one embodiment, Figure 2 and Figure 7As shown, cutting grooves 1121 are provided at both ends of the mounting groove 112, the bottom wall height of the cutting groove 1121 is lower than the bottom wall height of the mounting groove 112, the cutting groove 1121 and the bottom wall of the positioning bar 120 are combined to form a disassembly groove, and the notch of the disassembly groove is arranged outward. In this embodiment, cutting grooves 1121 are provided at both ends of the mounting groove 112, the bottom wall height of the cutting groove 1121 is lower than the bottom wall height of the mounting groove 112, when the positioning bar 120 is installed in the mounting groove 112, the cutting groove 1121 and the bottom wall of the positioning bar 120 are combined to form a disassembly groove, and the notch of the disassembly groove is arranged outward, after the connecting piece between the positioning bar 120 and the mounting groove 112 is removed, the positioning bar 120 can be lifted by inserting a finger into the disassembly groove, so that the positioning bar 120 can be more conveniently taken out from the inner side of the mounting groove 112.

[0047] In order to make the pin hole type positioning fixture 100 be installed evenly on the external installation table for use, in one embodiment, as Figure 2 and Figure 3 As shown, the pin hole type positioning fixture 100 also includes a pad block 180, which is arranged under the fixture plate 110. The pad block 180 is provided with a first connecting hole 1801 and a second connecting hole 1802. The positioning assembly also includes a second connecting member 170 and a third connecting member 190. The second connecting member 170 is arranged on the fixture plate 110 and extends into the first connecting hole 1801 to connect the fixture plate 110 with the pad block 180. The third connecting member 190 is passed through the second connecting hole 1802 for connection with an external mounting table. When the pin hole type positioning fixture 100 is not stable when installed on the external mounting table, a pad 180 can be installed under the fixture plate 110. The pad 180 can be further cut or polished according to the actual supporting effect of the pin hole type positioning fixture 100 and the external mounting table, so that the fixture plate 110 with the pad 180 installed can be stably installed on the external mounting table for use. When installing the pad 180, the second connecting member 170 can be used to pass through the fixture plate 110 and detachably connect with the first connecting hole 1801, and then the third connecting member 190 can be used to pass through the pad 180 and detachably connect with the external mounting table. Of course, in order to make the fixture plate 110 more stable, there can be multiple pads 180. In this embodiment, the number of pads 180 is three. Secondly, the second connecting member 170 and the third connecting member 190 can be bolts or clips.

[0048] The above description is only an optional embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A reusable pin-hole type zero-point positioning fixture for a CNC milling machine, characterized in that: include: The fixture plate has a processing table surface for mounting a workpiece, wherein the processing table surface is provided with a mounting groove and a plurality of mounting holes; as well as A positioning assembly includes a positioning strip, a first positioning piece and a positioning sleeve. The positioning strip is arranged in the mounting groove and is detachably connected to the fixture plate. A first positioning hole is extended on the positioning strip along the depth direction of the mounting groove. The positioning sleeve is detachably installed in the first positioning hole. The positioning sleeve is used for inserting the first positioning piece. A portion of the first positioning piece extends from the mounting groove to the outside of the processing table. The first positioning piece is used to position the workpiece.

2. The reusable pin-hole type zero-point positioning fixture for CNC milling machines according to claim 1, characterized in that: A second positioning hole is provided on the side of the positioning strip, and the second positioning hole is connected to the first positioning hole. The positioning assembly also includes a second positioning piece, and the second positioning piece is detachably arranged in the second positioning hole. A limiting part is provided on the positioning sleeve, and one end of the second positioning piece is limitedly matched with the limiting part.

3. The reusable pin-hole type zero-point positioning fixture for CNC milling machines according to claim 2, characterized in that: The limiting portion comprises a limiting groove arranged on the outer peripheral wall of the positioning sleeve, and one end of the second positioning member is inserted into the limiting groove.

4. The reusable pin-hole type zero-point positioning fixture for CNC milling machines according to claim 2, characterized in that: There are a plurality of the first positioning holes, and the plurality of the first positioning holes are arranged in sequence and at intervals along the length direction of the positioning strip, and each of the first positioning holes is used for installing a positioning sleeve.

5. The reusable pin-hole type zero-point positioning fixture for CNC milling machines according to claim 4, characterized in that: There are multiple second positioning holes, which are arranged in sequence along the length direction of the positioning strip, and are connected to the first positioning holes in a one-to-one correspondence. The second positioning holes are extended along the width direction of the positioning strip.

6. The reusable pin-hole type zero-point positioning fixture for CNC milling machines according to claim 5, characterized in that: The first positioning member includes a first latch and a second latch. The first latch is detachably disposed in a first positioning hole of the positioning bar near its end. The first latch is used to locate the zero point of the workpiece. The second latch is spaced apart from the first latch and detachably disposed in another of the first positioning holes.

7. The reusable pin-hole type zero-point positioning fixture for CNC milling machines according to claim 1, characterized in that: The positioning strip is provided with a third positioning hole at both ends along its length direction, and a fourth positioning hole is provided on the positioning strip. The positioning assembly also includes a positioning column and a first connecting piece. The positioning column is located at both ends of the mounting groove. The positioning column is arranged in the third positioning hole and inserted into the positioning groove at the bottom of the mounting groove. The first connecting piece is passed through the fourth positioning hole and connected to the bottom of the mounting groove.

8. The reusable pin-hole type zero-point positioning fixture for CNC milling machines according to claim 1, characterized in that: A boss is provided on the inner side of the first positioning hole, and the boss is used to receive the positioning sleeve.

9. The reusable pin-hole type zero-point positioning fixture for CNC milling machines according to claim 1, characterized in that: Cutting grooves are provided at both ends of the installation groove, the bottom wall height of the cutting groove is lower than the bottom wall height of the installation groove, the cutting groove and the bottom wall of the positioning strip are combined to form a disassembly groove, and the notch of the disassembly groove is arranged outward.

10. The reusable pin-hole type zero-point positioning fixture for CNC milling machines according to any one of claims 1 to 9, characterized in that: The reusable pin-hole type CNC milling machine zero-point positioning fixture also includes a plurality of pads, which are arranged under the fixture plate. The pads are provided with a first connecting hole and a second connecting hole. The positioning assembly also includes a second connecting member and a third connecting member. The second connecting member is arranged on the fixture plate and extends into the first connecting hole to connect the fixture plate with the pads. The third connecting member is passed through the second connecting hole for connection with an external mounting table.

Images