CN215239296U - Positioning device for machining clamp - Google Patents

Abstract

The utility model discloses a positioner for machining anchor clamps, comprising a base plate, set up the positioning mechanism on the bottom plate, positioning mechanism includes locating component and side direction pretension subassembly, locating component has first support, second support and third support, first support sets up the region between second support and third support, first support has first end and leans on die face and first side to lean on the die face, the second support has the second side and leans on the die face, the third support has the third side and leans on the die face, side direction pretension subassembly is used for pushing the product level to locating component, side direction pretension subassembly has first spring piece and second spring piece, between directional first support of force application direction and the second support of first spring piece, between directional first support of force application direction and the third support of second spring piece. The utility model discloses a positioner for machine tooling anchor clamps, location that can be accurate, the location of avoiding the operation to arouse is inaccurate.

Description

Positioning device for machining clamp

Technical Field

The utility model relates to a structure of machining anchor clamps, in particular to a positioner for machining anchor clamps.

Background

In the machine manufacturing industry, machining is a common and efficient machining process, and generally requires the use of a machine tool and a machining fixture.

Structurally, the machining fixture has a base plate and two master plates that are perpendicular to each other, thereby positioning the product in the horizontal direction.

During the use, place the product at the bottom plate, simultaneously, in the horizontal direction, make the product and two profiling boards contact to, utilize the bottom plate to realize the location of direction from top to bottom, utilize the profiling board to realize the location of horizontal direction.

However, in actual operation, the product often does not contact the backup plate, and the product cannot be accurately positioned in the horizontal direction.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a positioner for machining anchor clamps, location that can be accurate, the location of avoiding the operation to arouse is inaccurate.

The utility model discloses a realize through following technical scheme:

the utility model provides a positioning device for a machining clamp, which comprises a bottom plate and a positioning mechanism arranged on the bottom plate, the positioning mechanism comprises a positioning component and a lateral pre-tightening component, the positioning component is provided with a first support, a second support and a third support, the first support is arranged in the area between the second support and the third support, the first support is provided with a first bottom die-bearing surface and a first side die-bearing surface, the second support is provided with a second side die-bearing surface, the third support is provided with a third side die-bearing surface, the lateral pre-tightening assembly is used for horizontally pushing the product to the positioning assembly, the lateral pretensioning assembly is provided with a first spring pressing piece and a second spring pressing piece, the force application direction of the first spring pressing piece is directed between the first support and the second support, the force application direction of the second elastic pressing piece points to the position between the first support and the third support.

According to the utility model discloses an aspect a positioner for machining anchor clamps, first suppress the piece have the installing support, with installing support horizontal sliding connection's slide bar, set up in the butt awl of slide bar one end, set up in the supporting spring of the slide bar other end, the most advanced butt product that is used for of butt awl, supporting spring is used for promoting the slide bar removes towards the product.

According to the utility model discloses a positioner for machining anchor clamps of first aspect, the installing support is provided with position detector, position detector is used for detecting the position of slide bar.

According to the utility model discloses a positioner for machining anchor clamps, first support with the distance of third support is greater than first support with the distance of second support, locating component still includes two locating levers, two the side of locating lever is used for supporting the product, two the locating lever is located first support with between the third support, the directional two of application of force direction of second spring spare between the locating lever.

According to the utility model discloses an aspect a positioner for machining anchor clamps, locating component still includes the reference column, the reference column set up in first support with between the second support, the side of reference column is used for supporting the product, the application of force direction of first suppression spare is directional the reference column with between the first support or the reference column with between the second support.

According to the utility model discloses a positioner for machining anchor clamps, the second support is provided with the second end and leans on the mould face, locating component still includes the support column, the support column is close to the third support sets up, the top of support column is provided with the third end and leans on the mould face.

According to the utility model discloses a positioner for machining anchor clamps of first aspect, the third support is provided with the third concave part of connecting third side die bed face bottom.

According to the utility model discloses a positioner for machining anchor clamps of first aspect, the third support is provided with the connection the lower inclined plane of the bottom of third concave part, the end on lower inclined plane is followed and is close to the support column sets up.

According to the utility model discloses a positioner for machining anchor clamps, first support includes the installation body and the location body, the location body set up in the top of installation body, the location body sets up the first end lean on the die face with the die face is leaned on to first side, the high position that leans on the die face at the first end is less than the first side is leaned on the end of die face to be followed, the location body is provided with first concave part, first concave part is located the first end is leaned on the die face and is close to first side lean on die face one side, first concave part is provided with first concave position, first concave position set up in the bottom that the die face was leaned on to first side.

According to the utility model discloses a positioner for machining anchor clamps of first aspect, the top edge that leans on the mould face of first side is connected with first inclined plane, the top on first inclined plane is towards keeping away from the direction of first end by the mould face extends.

According to the utility model discloses a positioner for machining anchor clamps, the location body sets up and connects the second inclined plane of die face is leaned on at first end, the top on second inclined plane is connected the first end is leaned on the die face, the second inclined plane set up in at first end lean on the die face with the adjacent side of die face is leaned on to first side.

According to the utility model discloses an aspect a positioner for machining anchor clamps, the location body is provided with the third inclined plane, the third inclined plane set up in first end by the mould face with the adjacent side of mould face is leaned on to first side, the top on third inclined plane is followed and is close to the setting of second inclined plane.

According to the utility model discloses a positioner for machining anchor clamps of first aspect, the top edge on third inclined plane is less than the end edge on second inclined plane.

According to the utility model discloses a positioner for machining anchor clamps of first aspect, the top edge on third inclined plane is less than the bottom surface of first concave part.

According to the utility model discloses an aspect a positioner for machining anchor clamps, the location body is provided with the fourth inclined plane, the fourth inclined plane set up in keep away from by the die face at first end first side by die face one side, the top on fourth inclined plane is followed and is close to first end is by the die face setting.

According to the utility model discloses a positioner for machining anchor clamps of first aspect, the top edge on fourth inclined plane is less than first end lean on the mould face.

According to the utility model discloses a positioner for machining anchor clamps, the side edge of the horizontal direction that leans on the mould face of first side is all connected with the fifth inclined plane, the fifth inclined plane is towards keeping away from the direction of leaning on the mould face at first end extends.

According to the utility model discloses an aspect a positioner for machining anchor clamps, the location body has first arch, first bellied one side sets up first side and leans on the mould face, first arch dorsad one side that the mould face was leaned on to first side is provided with first convex part, first convex part downwardly extending to the bottom surface of installation body.

According to the utility model discloses a positioner for machine tooling anchor clamps, the installation body has the mounting hole, the location body is provided with the concave position of second, the pole portion of bolt is held to the mounting hole, the head of the concave position holding bolt of second, the bolt will first support is fixed in the bottom plate.

Has the advantages that: compared with the prior art, the utility model discloses a positioner for machining anchor clamps makes first support have first end and leans on die face and first side to lean on the die face through setting up first support, second support and third support to, utilize first support, second support and third support to support and fix a position the product, replaced original locate mode, can reduce the area of contact with the product, reduce and weigh, and simultaneously, adapt to the manifold condition of product appearance, in addition, also reduce the processing degree of difficulty of bottom plate.

And, the utility model discloses a positioner for machining anchor clamps is through setting up side direction pretension subassembly, make side direction pretension subassembly have first suppress piece and second suppress piece, therefore, first suppress piece is pushed the product to the second support, the second suppress will be pushed the product to the third support, the resultant force of first suppress piece and second suppress piece is pushed the product to first support, thereby, make product and first support, second support and third support keep in contact simultaneously, ensure the location accuracy, avoid the staff to place the condition not in place.

Meanwhile, the first support, the second support and the third support replace a bottom plate, so that the area for supporting a product is reduced, the resistance for pushing the product is reduced, the lateral pre-tightening assembly is convenient to push the product, and the positioning reliability is improved.

In addition, in operation, staff can contact the product with the lateral pre-tightening assembly firstly, push the first elastic pressing piece and the second elastic pressing piece to retreat, then press the product to the positioning assembly to finish charging, and charging is quick and accurate and is not easy to reverse.

Drawings

The present invention will be further described with reference to the accompanying drawings and examples;

FIG. 1 is a schematic view of a part of a machining jig including the present embodiment;

FIG. 2 is a schematic top view of the positioning device of FIG. 1;

fig. 3 is a schematic structural diagram of the first support in fig. 1.

Reference numerals: 100-installation body, 110-positioning body, 120-first bottom die-bearing surface, 130-first side die-bearing surface, 140-first concave part, 150-first concave part, 160-first inclined surface, 170-second inclined surface, 180-third inclined surface, 190-fourth inclined surface, 200-fifth inclined surface, 210-first protrusion, 230-installation hole, 240-second concave part, 300-positioning component, 310-lateral pre-tightening component, 320-first support, 330-second support, 340-third support, 350-first spring part, 360-second spring part, 370-installation support, 380-slide bar, 390-cone, 400-positioning rod, 410-positioning column, 420-support column, 430-second bottom die-bearing surface, 440-second side die-bearing surface, 450-third bottom mould side, 460-third side mould side, 470-third recess.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1, an embodiment of a fixture for machining is provided, and to emphasize, an embodiment of a positioning device for a machining fixture is provided.

Structurally, referring to fig. 1 and 2, the present embodiment relates to a bottom plate of a fixture, the bottom plate forms an installation reference, and meanwhile, the bottom plate can also be installed on a turntable, so that a product can be conveniently turned or erected, and clamping and machining errors are reduced.

In this embodiment, the bottom plate is provided with positioning mechanism, and positioning mechanism accomplishes the location to the product to, make the product have accurate position, be convenient for carry out accurate processing.

For the positioning mechanism, referring to fig. 2, the positioning mechanism includes a positioning assembly 300 and a lateral pretensioning assembly 310.

Wherein the positioning assembly 300 has a first support 320, a second support 330 and a third support 340, the first support 320 is disposed in an area between the second support 330 and the third support 340, the first support 320 has a first bottom mold surface 120 and a first side mold surface 130, the second support 330 has a second bottom mold surface 430 and a second side mold surface 440, and the third support 340 has a third side mold surface 460.

Meanwhile, near the third support 340, a support column 420 is further provided, and a third bottom die surface 450 is provided at a top end of the support column 420.

Thus, by providing the first bottom mold surface 120, the second bottom mold surface 430, and the third bottom mold surface 450, the product can be placed smoothly.

Meanwhile, by arranging the first side mold leaning surface 130, the second side mold leaning surface 440 and the third side mold leaning surface 460, the positioning of the product in the horizontal direction can be realized, so that the product obtains an accurate position.

In addition, the present embodiment is further provided with a lateral pre-tightening assembly 310, the lateral pre-tightening assembly 310 is used for horizontally pushing the product to the positioning assembly 300, that is, pushing the product to the first side mold backing surface 130, the second side mold backing surface 440 and the third side mold backing surface 460, so that the product is in contact with the first side mold backing surface 130, the second side mold backing surface 440 and the third side mold backing surface 460, and the positioning is realized by abutting contact, thereby avoiding errors caused by improper operation.

Specifically, the lateral pretensioning assembly 310 has a first spring 350 and a second spring 360, the force application direction of the first spring 350 is directed between the first support 320 and the second support 330, and the force application direction of the second spring 360 is directed between the first support 320 and the third support 340.

In detail, the first spring press 350 may have a mounting bracket 370, a sliding bar 380 horizontally slidably connected to the mounting bracket 370, an abutment cone 390 provided at one end of the sliding bar 380, and a support spring provided at the other end of the sliding bar 380, wherein a tip of the abutment cone 390 is used to abut against a product, and the support spring is used to push the sliding bar 380 to move toward the product.

Abutment cone 390 is preferably rubber and the outer surface of abutment cone 390 is preferably spherical to increase the contact area, improve resistance to wear and cutting, and avoid breakage during use.

The supporting springs are not shown in the drawing, but the first spring 350 and the second spring 360 may be of other elastic structures, which will not be described again.

In summary, in the embodiment, the first support 320, the second support 330 and the third support 340 are arranged to make the first support 320 have the first bottom mold supporting surface 120 and the first side mold supporting surface 130, so that the first support 320, the second support 330 and the third support 340 are used to support and position the product, which replaces the original positioning manner, can reduce the contact area with the product, reduce the pressure injury, adapt to the various situations of the product appearance, and in addition, reduce the processing difficulty of the bottom plate.

Moreover, in the present embodiment, by providing the lateral preloading component 310, the lateral preloading component 310 has the first spring pressing member 350 and the second spring pressing member 360, so that the first spring pressing member 350 pushes the product to the second seat 330, the second spring pressing member pushes the product to the third seat 340, and the resultant force of the first spring pressing member 350 and the second spring pressing member 360 pushes the product to the first seat 320, thereby the product can simultaneously keep contact with the first seat 320, the second seat 330 and the third seat 340, ensuring accurate positioning and avoiding the situation that the human hand is not put in place.

Meanwhile, the first support 320, the second support 330 and the third support 340 replace a bottom plate, so that the area for supporting a product is reduced, the resistance for pushing the product is reduced, the lateral pre-tightening assembly 310 is convenient to push the product, and the positioning reliability is improved.

In addition, in operation, staff can firstly contact the product with the lateral pre-tightening component 310, push the first elastic pressing piece 350 and the second elastic pressing piece 360 to retreat, then press the product to the positioning component 300, complete charging, and the charging is quick and accurate and is not easy to reverse.

In some preferred embodiments, the mounting bracket 370 may be provided with a position detector for detecting the position of the slide bar 380, and the form of the position detector may be various according to choice and purchase.

Therefore, by detecting the position of the sliding rod 380, whether the product is accurately positioned or not can be judged, and the phenomenon that a defective product is machined or a cutter is broken is avoided.

In some preferred embodiments, the distance between the first support 320 and the third support 340 may be greater than the distance between the first support 320 and the second support 330.

Therefore, the positioning requirements of different products are met, the positioning precision can be improved, and the torsion deviation is reduced.

In some preferred embodiments, the positioning assembly 300 may further include two positioning rods 400, the side surfaces of the two positioning rods 400 are used for supporting the product, the two positioning rods 400 are located between the first support 320 and the third support 340, and the force application direction of the second spring press 360 is directed between the two positioning rods 400.

Therefore, the two positioning rods 400 position and limit the product, so that reverse installation can be prevented, and inaccurate positioning caused by elastic deformation of the product can be realized.

In some preferred embodiments, the positioning assembly 300 further includes a positioning column 410, the positioning column 410 is disposed between the first support 320 and the second support 330, a side surface of the positioning column 410 is used for supporting the product, and the force applying direction of the first spring pressing member 350 is directed between the positioning column 410 and the first support 320 or between the positioning column 410 and the second support 330.

Similarly, the positioning column 410 is arranged, so that the problem of insufficient space between the first support 320 and the second support 330 can be solved, and various positioning requirements can be met.

In some preferred embodiments, the third support 340 may be provided with a third recess 470 connected to the bottom of the third side mold surface 460.

Therefore, the method is suitable for the condition that the edge of the product has excess materials, reduces the quality requirement of the product blank, simplifies the process route, and avoids increasing the workload of operators, such as frequently removing burrs on the edge of the product.

In some preferred embodiments, the third seat 340 may be provided with a lower slope connected to the bottom of the third recess 470, the bottom of the lower slope being disposed adjacent to the support column 420.

Therefore, by arranging the lower inclined plane, the bottom area of the third support 340 can be increased, the stability of the third support 340 is improved, and the installation and the fixation are also convenient.

Referring to fig. 3, in the first holder 320, the first holder 320 includes a mounting body 100 and a positioning body 110, the mounting body 100 is used to mount and fix the first holder 320, the positioning body 110 is used to position a product, and the mounting body 100 and the positioning body 110 may be integrally manufactured or may be manufactured separately.

When the mounting body 100 and the positioning body 110 are manufactured separately, different materials can be selected, so that the cost is reduced, and meanwhile, the positioning body 110 is made of a wear-resistant material, so that the wear resistance of the first support 320 is improved, and the first support 320 is durable.

In some preferred embodiments, the mounting body 100 may have a mounting hole 230, the positioning body 110 is provided with a second recess 240, the mounting hole 230 receives a shaft portion of the bolt, and the second recess 240 receives a head portion of the bolt.

As shown, four mounting holes 230 of the first holder 320 are provided, thereby uniformly fixing the mounting body 100 to prevent looseness.

Meanwhile, the second concave portion 240 is provided, so that the connection strength between the installation body 100 and the positioning body 110 is enhanced objectively, and the damage of the bolt is avoided.

For the positioning body 110, the positioning body 110 is disposed on the top of the mounting body 100, the positioning body 110 has a first bottom mold leaning surface 120 and a first side mold leaning surface 130, wherein the first bottom mold leaning surface 120 is disposed horizontally, the first bottom mold leaning surface 120 is abutted to the bottom of the product for positioning, the first side mold leaning surface 130 is disposed vertically, and the first side mold leaning surface 130 is abutted to the side of the product for positioning.

In order to avoid the excess material of the product edge, such as flash and burr, in the first support 320, the height position of the first bottom die-contacting surface 120 is lower than the bottom edge of the first side die-contacting surface 130, the positioning body 110 is provided with a first concave portion 140, the first concave portion 140 is positioned on the side of the first bottom die-contacting surface 120 close to the first side die-contacting surface 130, the first concave portion 140 is provided with a first concave portion 150, and the first concave portion 150 is arranged at the bottom of the first side die-contacting surface 130.

To sum up, first support 320 is through setting up installation body 100 and location body 110, make location body 110 be located the top of installation body 100, still make location body 110 have first end by die face 120 and first side by die face 130, therefore, make first support 320 have the function of the locating plate and the copying board of original anchor clamps concurrently, and simultaneously, still make first support 320 have small, simple to operate's characteristics, easily use different positions, can adapt to the manifold condition of product appearance, reduce the anchor clamps design degree of difficulty, shorten the design cycle of anchor clamps, easily realize standardizedly.

Meanwhile, the first support 320 is provided with the first concave part 140 and the first concave position 150, so that when excess materials exist at the edge of a product, the product can be reasonably avoided, the positioning is prevented from being affected, and therefore the quality requirement of the blank can be reduced.

In some preferred embodiments, a first inclined surface 160 may be connected to the top edge of the first side mold surface 130, and the top edge of the first inclined surface 160 extends away from the first bottom mold surface 120.

Therefore, when the product is placed from top to bottom, the first inclined plane 160 can guide the product, so as to avoid the edge of the product from being damaged, ensure that the side surface of the product can contact the first side die-leaning surface 130, ensure the positioning accuracy and reduce the operation difficulty.

In some preferred embodiments, the positioning body 110 may be provided with a second inclined surface 170 connected to the first bottom mold surface 120, the top of the second inclined surface 170 is connected to the first bottom mold surface 120, and the second inclined surface 170 is disposed at the adjacent side of the first bottom mold surface 120 and the first side mold surface 130.

Therefore, when the staff observes the first side mold surface 130 and uses the horizontal movement to contact and position the product, the second inclined surface 170 can also guide the product, reducing the contact between the edge of the product and the edge of the first bottom mold surface 120, so that the bottom surface of the product is accurately located on the first bottom mold surface 120, and ensuring the accurate positioning in the vertical direction.

In some preferred embodiments, a fifth inclined surface 200 may be connected to each of the horizontal side edges of the first side mold surface 130, and the fifth inclined surface 200 extends away from the first bottom mold surface 120.

Similarly, when the staff adopts the horizontal movement product to contact the location, fifth inclined plane 200 can lead the removal of product, adapts to the various and unable reasonable circumstances of selecting the horizontal movement direction of product appearance, in the operation, gives the staff certain degree of freedom.

In some preferred embodiments, the positioning body 110 may be provided with a third inclined surface 180, the third inclined surface 180 is disposed on the adjacent side of the first bottom mold surface 120 and the first side mold surface 130, and the top edge of the third inclined surface 180 is disposed adjacent to the second inclined surface 170.

Thus, by providing the third inclined surface 180, the space around the first bottom die surface 120 is increased, reducing the risk of interference.

In some preferred embodiments, the top edge of the third inclined surface 180 may also be lower than the bottom edge of the second inclined surface 170.

Thus, the second inclined surface 170 and the third inclined surface 180 form a step guide, and can also give a sense of being in place to an employee, thereby facilitating the employee to confirm whether a product is in place.

Meanwhile, a larger avoidance space is provided, and the device is suitable for the conditions of small product positioning surface and complex surrounding structure.

In some preferred embodiments, the top edge of the third inclined surface 180 may be lower than the bottom surface of the first recess 140.

Therefore, the use requirement is met, the manufacturing is convenient, and the tool is prevented from being broken due to stress when the third inclined surface 180 or the first concave part 140 is formed by machining.

In some preferred embodiments, the positioning body 110 may be provided with a fourth inclined surface 190, the fourth inclined surface 190 is disposed on the side of the first bottom mold surface 120 away from the first side mold surface 130, and the top edge of the fourth inclined surface 190 is disposed near the first bottom mold surface 120.

To skilled operative employee, the product can be removed by the orientation of die face 130 on the first side of perpendicular to the general probability, and sets up fourth inclined plane 190, also can be convenient lead, reduce to collide with, also be convenient for strike off the piece, avoid influencing the location.

In some preferred embodiments, the top edge of the fourth ramp 190 may be lower than the first bottom mold surface 120.

Therefore, when the product is lapped on the fourth inclined surface 190, the product can slide in the direction away from the first side close to the die surface 130, thereby highlighting the situation that the product is not placed in place, facilitating the operation confirmation and correction and improving the charging accuracy.

Referring to fig. 3, in order to form the first side mold surface 130, the positioning body 110 may have a first protrusion 210, and the first side mold surface 130 is disposed on one side of the first protrusion 210.

In some preferred embodiments, a side of the first protrusion 210 facing away from the first side mold backing surface 130 may be provided with a first protrusion extending downward to a bottom surface of the mounting body 100.

Therefore, the solid of the first protrusion 210 is increased, the strength of supporting the first side die surface 130 is increased, and the weight is reduced as much as possible.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims (10)

1. A positioning device for a machining fixture, comprising a base plate, a positioning mechanism arranged on the base plate, characterized in that the positioning mechanism comprises a positioning assembly (300) and a lateral pretensioning assembly (310), the positioning assembly (300) having a first abutment (320), a second abutment (330) and a third abutment (340), the first abutment (320) being arranged in an area between the second abutment (330) and the third abutment (340), the first abutment (320) having a first bottom mould surface (120) and a first lateral mould surface (130), the second abutment (330) having a second lateral mould surface (440), the third abutment (340) having a third lateral mould surface (460), the lateral pretensioning assembly (310) being adapted to push a product horizontally towards the positioning assembly (300), the lateral pretensioning assembly (310) having a first spring press (350) and a second spring press (360), the force application direction of the first spring pressing piece (350) points to the position between the first support (320) and the second support (330), and the force application direction of the second spring pressing piece (360) points to the position between the first support (320) and the third support (340).

2. The positioning device for a machining jig according to claim 1, wherein the first spring press (350) has a mounting bracket (370), a slide bar (380) horizontally slidably connected with the mounting bracket (370), an abutment cone (390) provided at one end of the slide bar (380), a support spring provided at the other end of the slide bar (380), a tip of the abutment cone (390) being used to abut against a product, the support spring being used to push the slide bar (380) to move toward the product.

3. A positioning device for a machining fixture according to claim 2, characterized in that the mounting bracket (370) is provided with a position detector for detecting the position of the slide bar (380).

4. The positioning device for machining jigs according to claim 1, wherein the distance between the first holder (320) and the third holder (340) is greater than the distance between the first holder (320) and the second holder (330), the positioning assembly (300) further comprises two positioning rods (400), the side surfaces of the two positioning rods (400) are used for supporting a product, the two positioning rods (400) are located between the first holder (320) and the third holder (340), and the force application direction of the second spring pressing member (360) is directed between the two positioning rods (400).

5. The positioning device for the machining jig as claimed in claim 4, wherein the positioning assembly (300) further comprises a positioning column (410), the positioning column (410) is disposed between the first support (320) and the second support (330), a side surface of the positioning column (410) is used for supporting a product, and a force application direction of the first spring pressing member (350) is directed between the positioning column (410) and the first support (320) or between the positioning column (410) and the second support (330).

6. A positioning device for a machining jig according to claim 1, characterized in that the second support (330) is provided with a second bottom die surface (430), the positioning assembly (300) further comprises a supporting column (420), the supporting column (420) is arranged near the third support (340), and a top end of the supporting column (420) is provided with a third bottom die surface (450).

7. A positioning device for a machining clamp according to claim 6, characterized in that the third seat (340) is provided with a third recess (470) connecting the bottom of the third side die surface (460).

8. A positioning device for a machining jig according to claim 7, characterized in that the third seat (340) is provided with a lower slope surface connecting the bottom of the third recess (470), the bottom edge of the lower slope surface being provided near the support column (420).

9. The positioning device for the machining jig according to claim 1, wherein the first bottom die surface (120) has a height position lower than a bottom edge of the first side die surface (130), the first support (320) has a first concave portion (140), the first concave portion (140) is located on a side of the first bottom die surface (120) close to the first side die surface (130), the first concave portion (140) is provided with a first concave portion (150), and the first concave portion (150) is provided on a bottom of the first side die surface (130).

10. The positioning device for a machining fixture of claim 9, wherein a first ramp (160) is attached to a top edge of the first side mold surface (130), a top portion of the first ramp (160) extending away from the first bottom mold surface (120).

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