CN211029034U - Positioning fixture - Google Patents

Abstract

The utility model relates to a positioning fixture, which belongs to the technical field of fixture equipment. There are at least two pairs of trapezoidal support blocks. The support blocks are connected to the first slider in the rail groove through the first bolt. By rotating the first bolt to tighten the first slider, the support block can be effectively fixed. The opposite side of the support block has a sloped surface. , through the cooperation of the relative two inclined surfaces to form a V-shaped support platform to support the cylindrical parts, the bottom of the support block is provided with a second row of teeth, through the matching structure between the first row of teeth and the second row of teeth, fine-tuning the relative two supports The distance between the blocks can be adapted to support parts with different pipe diameters, which is convenient for debugging, reduces the time for debugging the relative matching relationship between the positioning tool and the parts, and improves work efficiency.

Description

a positioning fixture

technical field

The utility model relates to a fixture device, in particular to a positioning fixture.

Background technique

In the process of machining cylindrical parts, it is generally necessary to set a V-shaped positioning tool for positioning the parts. At present, most V-shaped positioning tools are composed of two V-shaped blocks that cooperate with each other. After debugging the two V-shaped blocks, all parts of the same batch can be processed.

However, once the V-shaped positioning tool is removed and the cylindrical parts are processed again, it is necessary to re-debug, not only the debugging between the V-shaped block and the part, but also one of the debugged V-shaped blocks needs to be used as a benchmark. Debugging a V-shaped block is a tedious process and wastes a lot of time.

Utility model content

In order to overcome the defects of the prior art, the utility model provides a positioning fixture. By arranging a plurality of positioning guide rails on the bottom plate, a trapezoidal support block is arranged on the positioning guide rail, and the support block and the positioning guide rail are matched through a tooth arrangement. The support block cooperates to form a V-shaped support platform that supports the part. As long as the positioning fixture is adjusted for the part to be processed, the part can be directly clamped, and the tool can be processed, saving debugging time.

The technical solution to achieve the above purpose is:

The utility model provides a positioning fixture, which comprises a base plate, a plurality of positioning guide rails are arranged on the upper surface of the base plate in parallel, the positioning guide rail is provided with an inverted T-shaped rail groove, and the top of the positioning guide rail is evenly distributed with a plurality of positioning guide rails. a row of teeth

It also includes at least two pairs of trapezoidal support blocks, wherein each pair of support blocks is located on the top of the same positioning guide rail, the support block has an inclined surface, and the inclined surfaces of each pair of support blocks are symmetrically matched to form a V-shaped support platform for Support the cylindrical part to be machined;

The support block is provided with a first threaded through hole arranged up and down, a first bolt is installed in the first threaded through hole, and the support block is connected with a T-shaped first sliding block through the first bolt. The first sliding block is located in the rail groove, and there is a gap between the bottom of the first sliding block and the rail groove, and the first sliding block is tightened by rotating the first bolt to effectively fix the support block;

The bottom of the support block is provided with a second row of teeth matched with the first row of teeth, and the distance between the two opposite support blocks can be fine-tuned through the cooperation of the tooth-row structure to suit the cylindrical parts to be processed. diameter.

Further, both ends of the rail groove are provided with a T-shaped second sliding block, the top of the second sliding block is connected with a pressure plate fixing block, and the pressure plate fixing block is provided with first threaded holes arranged up and down;

It also includes a number of pairs of screw rods corresponding to the support block, the screw rods are installed in the first threaded holes of the pressure plate fixing block on the positioning guide rail where the support block is located, and the tops of each pair of screw rods are sleeved A pressing plate is provided, the pressing plate, the screw rod and the positioning guide rail form a rectangular frame structure, and the upper surface of the cylindrical part is pressed by the pressing plate.

Further, the pressure plate fixing block is provided with at least two second threaded through holes arranged up and down, a second bolt is installed in the second threaded through hole, and the pressure plate fixing block is connected to the a second sliding block, with a gap between the bottom of the second sliding block and the rail groove;

The bottom of the pressure plate fixing block is provided with a third row of teeth matched with the first row of teeth, and the connection between the pressure plate fixing block and the positioning guide rail is strengthened through the cooperation of the tooth row structure.

Further, a nut is installed on the upper end of the screw rod, and the nut is located above the pressing plate for pressing the pressing plate against the surface of the cylindrical part.

Further, a rigid cover plate is symmetrically installed on the inclined surface of each pair of support blocks to support the cylindrical parts and bear the contact friction with the parts. Once the accuracy is reduced or damaged, it is easy to replace and save costs.

Beneficial effect: Compared with the prior art, the difference of the present utility model is that the positioning fixture provided by the present utility model includes a base plate, a plurality of positioning guide rails are arranged on the base plate, and the surface of the positioning guide rail is provided with a first row of teeth, The bottom of the positioning guide rail is provided with a T-shaped rail groove, and also includes at least two pairs of trapezoidal support blocks. The support blocks are connected to the first slider in the rail groove through the first bolt, and the first slider is tightened by rotating the first bolt, which can effectively The support block is fixed, and the opposite side of the two support blocks has an inclined surface, and a V-shaped support platform is formed to support the cylindrical part through the cooperation of the two inclined surfaces. The bottom of the support block is provided with a second row of teeth, through the first row of teeth and the second row of teeth The matching structure between the rows of teeth, fine-tuning the distance between the two support blocks, can adapt to support parts with different pipe diameters, easy to debug, and reduce the relative coordination between the debugging and positioning tooling and the parts, and between the positioning tooling. time and improve work efficiency.

Description of drawings

FIG. 1 is a schematic structural diagram of a positioning fixture according to a preferred embodiment of the present invention.

FIG. 2 is a front partial cross-sectional view of a positioning fixture according to a preferred embodiment of the present invention.

Among them, 1-base plate, 2-positioning guide rail, 21-rail groove, 22-first row of teeth, 3-support block, 31-first pair of support blocks, 32-second pair of support blocks, 33-slope, 34- The first threaded through hole, 35 - the first slider, 4 - the pressure plate fixing block, 41 - the second threaded through hole, 5 - the screw rod, 51 - the nut, 6 - the pressure plate, 7 - the cover plate, 9 - the parts.

Detailed ways

The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

Referring to FIG. 1 and FIG. 2, the present invention provides a positioning fixture, which includes a base plate 1, and four positioning guide rails 2 are arranged on the upper surface of the base plate 1 in parallel, and the positioning guide rail 2 is provided with an inverted T-shaped rail groove 21. , the top of the positioning guide rail 2 is evenly distributed with a first row of teeth 22;

It also includes two pairs of trapezoidal support blocks 3, which form supports at both ends of the part 9, wherein the first pair of support blocks 31 are located on the top of the first positioning guide rail 2, and the second pair of support blocks 32 are located on the third positioning guide rail. 2, the support block 3 has an inclined surface 33, and the inclined surfaces 33 of each pair of support blocks 3 are symmetrically matched to form a V-shaped support platform for supporting the cylindrical part 9 to be processed;

Obviously, according to the actual processing situation, three or five or six positioning guide rails 2 can also be set to adapt to the processing of various cylindrical parts 9 of different lengths, and the number of support blocks 3 can also be set to three pairs or even four pairs. for better support;

The support block 3 is provided with a first threaded through hole 34 arranged up and down, a first bolt is installed in the first threaded through hole 34, and the support block 3 is connected with a T-shaped first slide through the first bolt. Block 35, the first sliding block 35 is located in the rail groove 21, and there is a gap between the bottom of the first sliding block 35 and the rail groove 21, and the first sliding block is tightened by rotating the first bolt 35, so as to effectively fix the support block 3;

The bottom of the support block 3 is provided with a second row of teeth matched with the first row of teeth 22, and the distance between the two opposite support blocks 3 can be fine-tuned through the cooperation of the row of teeth to adapt to the cylinder to be processed. The diameter of the shaped part 9.

As a preferred embodiment of the present invention, both ends of the rail groove 21 are provided with a T-shaped second sliding block 23, and a pressure plate fixing block 4 is connected to the top of the second sliding block 23. The pressure plate fixing block 4. There are first threaded holes arranged up and down;

It also includes two pairs of screw rods 5, wherein the first pair of screw rods 5 is installed in the first threaded hole of the pressure plate fixing block 4 on the first positioning guide rail 2, and the second pair of screw rods 5 is installed in the third positioning guide rail 2. In the first threaded hole of the pressure plate fixing block 4 on the guide rail 2, a pressure plate 6 is sleeved on the top of each pair of screw rods 5, and a rectangular frame structure is formed between the pressure plate 6 and the same pair of screw rods 5 and the positioning guide rail 2. 6 Press the upper surface of the cylindrical part 9, and the support block 3 supports the lower surface of the part 9, thereby fixing the part 9;

Preferably, the pressure plate fixing block 4 is provided with two second threaded through holes 41 arranged up and down, which are respectively arranged symmetrically at the ends, and a second bolt is installed in the second threaded through holes 41, and the pressure plate fixing block 4. Connect the second sliding block 23 through the second bolt, there is a gap between the bottom of the second sliding block 23 and the rail groove 21, and tighten the second sliding block 23 by rotating the second bolt, so as to Effectively fix the pressure plate fixing block 4;

The bottom of the pressure plate fixing block 4 is provided with a third row of teeth matched with the first row of teeth 22 .

Preferably, a nut 51 is installed on the upper end of the screw rod 5 , and the nut 51 is located above the pressing plate 6 for pressing the pressing plate 6 against the surface of the cylindrical part 9 .

Preferably, a rigid cover plate 7 is symmetrically installed on the inclined surface 33 of each pair of support blocks 3 to support the cylindrical part 9 and bear the contact friction with the part 9. Once the accuracy is reduced or damaged, it is easy to replace. save costs.

It should be noted that the terms "first and second" in the present invention are only used for the purpose of description, do not represent any order, and cannot be understood as indicating or implying relative importance, and these terms may be interpreted as names.

The above specific embodiments are only preferred embodiments of this creation, and are not intended to limit this creation. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this creation shall be included in this creation. within the scope of protection.

Claims (5)

1. A positioning fixture, comprising a base plate, characterized in that, the upper surface of the base plate is provided with several positioning guide rails in parallel, and the positioning guide rail is provided with an inverted T-shaped rail groove, and the top of the positioning guide rail is evenly distributed There is a first row of teeth; It also includes at least two pairs of trapezoidal support blocks, wherein each pair of support blocks is located on the top of the same positioning guide rail, the support blocks have an inclined surface, and the inclined surfaces of each pair of support blocks are symmetrically matched to form a V-shaped support platform; The support block is provided with a first threaded through hole arranged up and down, a first bolt is installed in the first threaded through hole, and the support block is connected with a T-shaped first sliding block through the first bolt. The first sliding block is located in the rail groove, and there is a gap between the bottom of the first sliding block and the rail groove; The bottom of the support block is provided with a second row of teeth matched with the first row of teeth. 2. positioning fixture as claimed in claim 1 is characterized in that: Both ends of the rail groove are provided with a T-shaped second sliding block, the top of the second sliding block is connected with a pressure plate fixing block, and the pressure plate fixing block is provided with first threaded holes arranged up and down; It also includes a number of pairs of screw rods corresponding to the support block, the screw rods are installed in the first threaded holes of the pressure plate fixing block on the positioning guide rail where the support block is located, and the tops of each pair of screw rods are sleeved A pressing plate is provided, and the pressing plate, the screw rod and the positioning guide rail form a rectangular frame structure. 3. positioning fixture as claimed in claim 2 is characterized in that: The pressure plate fixing block is provided with at least two second threaded through holes arranged up and down, second bolts are installed in the second threaded through holes, and the pressure plate fixing block is connected to the second sliding block through the second bolts. a block, there is a gap between the bottom of the second sliding block and the rail groove; The bottom of the pressing plate fixing block is provided with a third row of teeth matched with the first row of teeth. 4. positioning fixture as claimed in claim 2 is characterized in that: A nut is installed on the upper end of the screw rod, and the nut is located above the pressing plate. 5. positioning fixture as claimed in claim 1 is characterized in that: A rigid cover plate is symmetrically installed on the inclined surface of each pair of support blocks.

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