High-precision positioning mandrel

Abstract

The utility model relates to the technical field of positioning mandrels, and discloses a high-precision positioning mandrel which comprises a connecting mechanism including a lower air pipe and an upper air pipe, and a pneumatic control mechanism including an assembly seat, a mounting table, an insertion hole, a lower electromagnetic valve and an upper electromagnetic valve, the mandrel mechanism comprises a lower half ring, an upper half ring, a clamping thorn groove, barbs, a lower mounting hole, a lower telescopic rod, a lower rubber pad, an upper mounting hole, an upper telescopic rod and an upper rubber pad, and the lower air pipe is fixedly mounted at the output end of the lower electromagnetic valve and penetrates through an insertion hole to be fixedly connected with the lower telescopic rod; the upper air pipe is fixedly installed at the output end of the upper electromagnetic valve and penetrates through the inserting hole to be fixedly connected with the upper telescopic rod. The high-precision positioning mandrel is provided with the connecting mechanism, the position of the lower air pipe is limited through the lower electromagnetic valve and the lower telescopic rod, the position of the upper air pipe is limited through the upper electromagnetic valve and the upper telescopic rod, an air path of the lower electromagnetic valve conveniently controls the lower telescopic rod to stretch out and draw back through the lower air pipe, the upper air pipe and the lower air pipe are similar, the structure is simple, production and assembly are convenient, and cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of positioning mandrels, in particular to a high-precision positioning mandrel. Background Art

[0002] In the process of machining annular workpieces, a mandrel is usually required to position the annular workpiece to ensure that the annular workpiece and the machining unit are at the same axiality;

[0003] The existing publication number CN113927232A discloses a high-precision positioning mandrel, including a mounting shaft, and the mounting shaft is provided with a plurality of positioning components along the length direction, and the positioning components are provided with an adjustment sleeve and a wedge block, and a plurality of wedge blocks are provided around the circumference of the mounting shaft, and a matching inclined surface structure is provided between the wedge block and the mounting shaft, so as to be opened or closed by the inclined surface structure when the mounting shaft moves axially, and the adjustment sleeve can be adjusted along the axial movement of the mounting shaft and is arranged on the mounting shaft, and the adjustment sleeve cooperates with the wedge block to drive the wedge block to move axially along the mounting shaft during the movement. The structure of the present invention, after the parts are assembled and fixed, controls the wedge block to close by the adjustment sleeve, so that the mounting shaft is separated from the parts, so that it can be taken out smoothly without the use of brute force, thereby effectively reducing the labor intensity, and at the same time avoiding damage to the mounting shaft and extending the service life;

[0004] However, the existing high-precision positioning mandrel improves its positioning accuracy by opening the wedge and pressing it against the annular workpiece, and the annular workpiece can be easily removed by retracting the wedge. However, a series of complex mechanical structures are used to drive the wedge to open and retract, which makes assembly very inconvenient during the production of the mandrel and increases production costs. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] The purpose of the utility model is to provide a high-precision positioning mandrel to solve the problem proposed in the above background technology that the existing high-precision positioning mandrel improves its positioning accuracy by opening the wedge block and making it close to the annular workpiece, and the wedge block is retracted to easily remove the annular workpiece, while a series of complex mechanical structures are used to drive the wedge block to open and retract, which makes assembly very inconvenient during the production of the mandrel and increases the production cost.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-precision positioning mandrel, comprising a connecting mechanism: a lower air pipe and an upper air pipe, an air control mechanism: an assembly seat, a mounting platform, a socket, a lower solenoid valve and an upper solenoid valve, a mandrel mechanism: a lower half ring, an upper half ring, a thorn groove, a barb, a lower mounting hole, a lower telescopic rod, a lower rubber pad, an upper mounting hole, an upper telescopic rod and an upper rubber pad, the lower air pipe is fixedly installed at the output end of the lower solenoid valve and is fixedly connected to the lower telescopic rod through the socket, the upper air pipe is fixedly installed at the output end of the upper solenoid valve and is fixedly connected to the upper telescopic rod through the socket.

[0009] Preferably, the mounting table is fixedly mounted on the front end of the assembly seat, and the socket is fixedly arranged on the outer end of the mounting table. The position of the mounting table is limited by the assembly seat, and the mounting table limits the position of the socket, which makes it convenient to bolt the assembly seat to the machine tool, thereby facilitating the fixing of the mounting table to fix the socket, so that the mounting table can be inserted.

[0010] Preferably, the lower solenoid valve is fixedly installed at the front end of the assembly seat, and the upper solenoid valve is fixedly installed at the front end of the assembly seat. The position of the lower solenoid valve is limited by the assembly seat, and the position of the upper solenoid valve is limited by the assembly seat, so that the lower solenoid valve and the upper solenoid valve are fixed to perform air control respectively and control the circulation of the air circuit.

[0011] Preferably, the lower half ring is fixedly mounted on the front end of the mounting platform, and the upper half ring is fixedly mounted on the top end of the lower half ring. The position of the lower half ring is limited by the mounting platform, and the position of the upper half ring is limited by the lower half ring, so that the upper half ring can be fixed by fixing the lower half ring, thereby forming a complete circular ring as a core shaft.

[0012] Preferably, the barb groove is fixedly arranged at the top end of the lower half ring, the barb groove is symmetrically distributed, the barb is fixedly installed at the bottom end of the upper half ring and is clamped in the barb groove, the position of the barb groove is limited by the lower half ring, and the position of the barb is limited by the upper half ring and the barb groove, so that the upper half ring can be fixed to the lower half ring by clamping the barb in the barb groove, so that the upper half ring can be assembled, which is convenient for assembling other parts in the core shaft.

[0013] Preferably, the lower mounting hole is fixedly arranged at the outer end of the lower semi-ring, the lower mounting holes are symmetrically distributed, the lower telescopic rod is fixedly mounted at the inner end of the lower mounting hole, the lower rubber pad is fixedly mounted at the transmission end of the lower telescopic rod, the position of the lower mounting hole is defined by the lower semi-ring, the lower mounting hole defines the position of the lower telescopic rod, and the lower telescopic rod defines the position of the lower rubber pad, so that it is convenient to fix the lower mounting hole to fix the lower telescopic rod, and convenient for the lower telescopic rod to drive the lower rubber pad to telescope and fit tightly against the inner wall of the workpiece.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The high-precision positioning mandrel is equipped with a connecting mechanism. The position of the lower air pipe is limited by the lower solenoid valve and the lower telescopic rod, and the position of the upper air pipe is limited by the upper solenoid valve and the upper telescopic rod. It is convenient for the air path of the lower solenoid valve to control the extension and retraction of the lower telescopic rod through the lower air pipe. The upper air pipe is similar to the lower air pipe. The structure is simple, the production and assembly are convenient, and the cost is low.

[0016] 2. The high-precision positioning mandrel is equipped with a pneumatic control mechanism. The position of the mounting table is limited by the assembly seat, and the mounting table limits the position of the jack, so that the assembly seat bolts are fixed on the machine tool, so that the mounting table is conveniently fixed to fix the jack, so that the mounting table can be inserted, and the position of the lower solenoid valve is limited by the assembly seat, and the position of the upper solenoid valve is limited by the assembly seat, so that the lower solenoid valve and the upper solenoid valve are conveniently fixed to perform pneumatic control respectively, and control the flow of the gas path;

[0017] 3. The high-precision positioning mandrel is equipped with a mandrel mechanism, the position of the lower half ring is defined by the mounting table, the lower half ring defines the position of the upper half ring, so that the lower half ring is fixed to fix the upper half ring, thereby forming a complete circular ring as the mandrel, the position of the clamping groove is defined by the lower half ring, the upper half ring and the clamping groove define the position of the barb, so that the barb is clamped in the barb groove to fix the upper half ring on the lower half ring, so that the upper half ring can be assembled, and it is convenient to assemble other parts in the mandrel, the position of the lower mounting hole is defined by the lower half ring, the lower mounting hole defines the position of the lower telescopic rod, the lower telescopic rod defines the position of the lower rubber pad, so that the lower mounting hole is fixed to fix the lower telescopic rod, and the lower telescopic rod drives the lower rubber pad to telescope and fit closely to the inner wall of the workpiece, the position of the upper mounting hole is defined by the upper half ring, the upper mounting hole defines the position of the upper telescopic rod, and the upper telescopic rod defines the position of the upper rubber pad, so that the upper mounting hole is fixed to fix the upper telescopic rod, and the upper telescopic rod drives the upper rubber pad to telescope and fit closely to the inner wall of the workpiece, thereby positioning the workpiece on the mandrel with high precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the gas control mechanism of the utility model;

[0020] Figure 3 This is a schematic diagram of the cross-sectional structure of the mandrel mechanism of the utility model;

[0021] Figure 4 It is a schematic diagram of the structure of the connecting mechanism of the utility model.

[0022] In the figure: 1. connecting mechanism; 101. lower air pipe; 102. upper air pipe; 2. air control mechanism; 201. assembly seat; 202. mounting table; 203. jack; 204. lower solenoid valve; 205. upper solenoid valve; 3. spindle mechanism; 301. lower half ring; 302. upper half ring; 303. thorn groove; 304. barb; 305. lower mounting hole; 306. lower telescopic rod; 307. lower rubber pad; 308. upper mounting hole; 309. upper telescopic rod; 310. upper rubber pad. DETAILED DESCRIPTION

[0023] 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 in 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.

[0024] See also Figure 1-Figure 4 The utility model provides a technical solution: a high-precision positioning mandrel, including a connecting mechanism 1: a lower air pipe 101 and an upper air pipe 102, an air control mechanism 2: an assembly seat 201, a mounting platform 202, a socket 203, a lower solenoid valve 204 and an upper solenoid valve 205, a mandrel mechanism 3: a lower half ring 301, an upper half ring 302, a thorn groove 303, a barb 304, a lower mounting hole 305, a lower telescopic rod 306, a lower rubber pad 307, an upper mounting hole 308, an upper telescopic rod 309 and an upper rubber pad 310, the lower air pipe 101 is fixedly installed at the output end of the lower solenoid valve 204 and is fixedly connected to the lower telescopic rod 306 through the socket 203, the upper air pipe 102 is fixedly installed at the output end of the upper solenoid valve 205 and is fixedly connected to the upper telescopic rod 309 through the socket 203;

[0025] The mounting platform 202 is fixedly mounted on the front end of the assembly seat 201, and the socket 203 is fixedly arranged on the outer end of the mounting platform 202. The position of the mounting platform 202 is limited by the assembly seat 201, and the mounting platform 202 limits the position of the socket 203, which is convenient for fixing the assembly seat 201 on the machine tool with bolts, thereby facilitating the fixing of the mounting platform 202 to fix the socket 203, so that the mounting platform 202 can be inserted, the lower solenoid valve 204 is fixedly mounted on the front end of the assembly seat 201, and the upper solenoid valve 205 is fixedly mounted on the front end of the assembly seat 201. The position of the lower solenoid valve 204 is limited by the assembly seat 201, and the position of the upper solenoid valve 205 is limited by the assembly seat 201, which is convenient for fixing the lower solenoid valve 204 and the upper solenoid valve 205 to respectively perform air control and control the flow of the air path;

[0026] The lower half ring 301 is fixedly mounted on the front end of the mounting platform 202, and the upper half ring 302 is fixedly mounted on the top of the lower half ring 301. The position of the lower half ring 301 is defined by the mounting platform 202, and the position of the upper half ring 302 is defined by the lower half ring 301, so as to fix the lower half ring 301 to fix the upper half ring 302, thereby forming a complete circular ring as a core shaft. The barbed grooves 303 are fixedly arranged on the top of the lower half ring 301, and the barbed grooves 303 are symmetrically distributed. The barbs 304 are fixedly mounted on the bottom end of the upper half ring 302 and are clamped on the clamping The position of the barb groove 303 is defined by the lower half ring 301, and the position of the barb 304 is defined by the upper half ring 302 and the barb groove 303, so that the upper half ring 302 can be fixed on the lower half ring 301 by clamping the barb 304 in the barb groove 303, so that the upper half ring 302 can be assembled, and it is convenient to assemble other parts in the core shaft, and the lower mounting hole 305 is fixedly arranged at the outer end of the lower half ring 301, and the lower mounting holes 305 are symmetrically distributed, and the lower telescopic rod 306 is fixedly installed at the inner end of the lower mounting hole 305. The rubber pad 307 is fixedly installed on the transmission end of the lower telescopic rod 306, and the position of the lower mounting hole 305 is defined by the lower half ring 301. The lower mounting hole 305 defines the position of the lower telescopic rod 306, and the lower telescopic rod 306 defines the position of the lower rubber pad 307, so that the lower mounting hole 305 is fixed to fix the lower telescopic rod 306, so that the lower telescopic rod 306 drives the lower rubber pad 307 to extend and contract tightly against the inner wall of the workpiece. The upper mounting hole 308 is fixedly set on the outer end of the upper half ring 302, and the upper mounting holes 308 are symmetrically distributed. The rod 309 is fixedly mounted on the inner end of the upper mounting hole 308, and the upper rubber pad 310 is fixedly mounted on the transmission end of the upper telescopic rod 309. The position of the upper mounting hole 308 is limited by the upper half ring 302, the upper mounting hole 308 limits the position of the upper telescopic rod 309, and the upper telescopic rod 309 limits the position of the upper rubber pad 310, so that the upper mounting hole 308 is fixed to fix the upper telescopic rod 309, and the upper telescopic rod 309 drives the upper rubber pad 310 to extend and contract to fit tightly against the inner wall of the workpiece, thereby positioning the workpiece on the core shaft with high precision.

[0027] Working principle: The assembly seat 201 defines the position of the mounting platform 202, and the mounting platform 202 defines the position of the socket 203, so that the assembly seat 201 can be bolted to the machine tool, so as to facilitate the fixing of the mounting platform 202 to fix the socket 203, so that the mounting platform 202 can be inserted, the assembly seat 201 defines the position of the lower solenoid valve 204, and the assembly seat 201 defines the position of the upper solenoid valve 205, so that the lower solenoid valve 204 and the upper solenoid valve 205 can be fixed to perform gas control respectively to control the flow of the gas path, and the mounting platform 202 defines The position of the lower half ring 301 is determined by the lower half ring 301 to define the position of the upper half ring 302, so that the lower half ring 301 is fixed to fix the upper half ring 302, thereby forming a complete circular ring as the core shaft. The lower half ring 301 defines the position of the clamping groove 303. The upper half ring 302 and the clamping groove 303 define the position of the barb 304, so that the barb 304 can be clamped in the clamping groove 303 to fix the upper half ring 302 on the lower half ring 301, so that the upper half ring 302 can be assembled, which is convenient for assembling other parts in the core shaft. The lower half ring 301 defines the position of the clamping groove 303. The lower mounting hole 305 is determined, the lower mounting hole 305 defines the position of the lower telescopic rod 306, the lower telescopic rod 306 defines the position of the lower rubber pad 307, it is convenient to fix the lower mounting hole 305 to fix the lower telescopic rod 306, and it is convenient for the lower telescopic rod 306 to drive the lower rubber pad 307 to telescope and be close to the inner wall of the workpiece, the upper half ring 302 defines the position of the upper mounting hole 308, the upper mounting hole 308 defines the position of the upper telescopic rod 309, and the upper telescopic rod 309 defines the position of the upper rubber pad 310, which is convenient to fix the upper mounting hole 308 to fix The upper telescopic rod 309 is fixed, so that the upper telescopic rod 309 can drive the upper rubber pad 310 to telescope and fit tightly against the inner wall of the workpiece, thereby positioning the workpiece on the core shaft with high precision. The lower solenoid valve 204 and the lower telescopic rod 306 define the position of the lower air pipe 101, and the upper solenoid valve 205 and the upper telescopic rod 309 define the position of the upper air pipe 102, so that the air path of the lower solenoid valve 204 can control the lower telescopic rod 306 to telescope through the lower air pipe 101. The upper air pipe 102 is similar to the lower air pipe 101, with a simple structure, convenient production and assembly, and low cost.

[0028] Finally, it should be noted that the above content is only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Simple modifications or equivalent substitutions of the technical solution of the utility model by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the utility model.

Claims

1. A high-precision positioning mandrel, comprising a connecting mechanism (1): a lower air pipe (101) and an upper air pipe (102), an air control mechanism (2): an assembly seat (201), a mounting platform (202), a jack (203), a lower solenoid valve (204) and an upper solenoid valve (205), a mandrel mechanism (3): a lower half ring (301), an upper half ring (302), a thorn groove (303), a barb (304), a lower mounting hole (305), a lower telescopic rod (306), a lower rubber pad (307), an upper mounting hole (308), an upper telescopic rod (309) and an upper rubber pad (310), characterized in that: The lower air pipe (101) is fixedly installed at the output end of the lower solenoid valve (204) and passes through the plug hole (203) to be fixedly connected to the lower telescopic rod (306), and the upper air pipe (102) is fixedly installed at the output end of the upper solenoid valve (205) and passes through the plug hole (203) to be fixedly connected to the upper telescopic rod (309).

2. A high-precision positioning mandrel according to claim 1, characterized in that: The mounting platform (202) is fixedly mounted on the front end of the assembly seat (201), and the insertion hole (203) is fixedly arranged on the outer end of the mounting platform (202).

3. A high-precision positioning mandrel according to claim 2, characterized in that: The lower solenoid valve (204) is fixedly mounted on the front end of the assembly seat (201), and the upper solenoid valve (205) is fixedly mounted on the front end of the assembly seat (201).

4. A high-precision positioning mandrel according to claim 3, characterized in that: The lower half ring (301) is fixedly mounted on the front end of the mounting platform (202), and the upper half ring (302) is fixedly mounted on the top end of the lower half ring (301).

5. A high-precision positioning mandrel according to claim 4, characterized in that: The thorn grooves (303) are fixedly arranged at the top end of the lower half ring (301), and the thorn grooves (303) are symmetrically distributed. The barbs (304) are fixedly installed at the bottom end of the upper half ring (302) and are clamped in the thorn grooves (303).

6. A high-precision positioning mandrel according to claim 5, characterized in that: The lower mounting holes (305) are fixedly arranged at the outer ends of the lower half ring (301), the lower mounting holes (305) are symmetrically distributed, the lower telescopic rod (306) is fixedly installed at the inner ends of the lower mounting holes (305), and the lower rubber pad (307) is fixedly installed at the transmission end of the lower telescopic rod (306).

7. A high-precision positioning mandrel according to claim 6, characterized in that: The upper mounting holes (308) are fixedly arranged at the outer ends of the upper half ring (302), the upper mounting holes (308) are symmetrically distributed, the upper telescopic rod (309) is fixedly installed at the inner ends of the upper mounting holes (308), and the upper rubber pad (310) is fixedly installed at the transmission end of the upper telescopic rod (309).

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