Quick positioning and clamping tool for CNC (computer numerical control)

Abstract

The utility model discloses a fast positioning and clamping tool for CNC. The fast positioning and clamping tool comprises a supporting plate, a supporting table, a positioning block A, a clamp body, a positioning block B, a positioning air cylinder and a locking air cylinder. The positioning strip on the front side of the positioning block A is matched with the positioning block B, so that large-area contact between the mounting base plate and the positioning block A is avoided, chip accumulation in the contact surface is avoided, a chip removal gap is also formed between the positioning base plate and the supporting table, and the machining precision is guaranteed in a multiple mode; the positioning ribs on the supporting table achieve rapid positioning of the installation substrates, the installation substrates can be rapidly exchanged, and meanwhile the machining precision of all batches is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of CNC fixtures, in particular to a quick positioning and clamping fixture for CNC. Background Art

[0002] In CNC batch parts processing, vises or suction cups are usually used. However, vises have only one opening and closing mouth and can only clamp one part at a time, which is too inefficient. For small or irregular workpieces, the suction cup-type homemade multi-station tooling has limited contact area and too small adsorption force, which can easily knock the workpiece away during milling. In addition, the suction cup-type homemade multi-station tooling is difficult to accurately position and cannot guarantee the processing accuracy of multiple batches of workpieces. Summary of the invention

[0003] The utility model aims to overcome the deficiencies of the prior art and provide a CNC rapid positioning clamping tooling, which can realize rapid positioning of workpieces, meet mass production requirements and improve work efficiency.

[0004] The technical solution adopted by the utility model is:

[0005] A quick positioning and clamping tool for CNC, comprising a support plate, a support table, a positioning block A, a fixture body, a positioning block B, a positioning cylinder and a locking cylinder;

[0006] The support plate is arranged on the CNC workbench; the support table is arranged on the center of the support plate, and positioning ridges are symmetrically arranged near the two ends of the support table; the positioning blocks A are respectively arranged on the two positioning ridges on the rear side of the support table, and a positioning strip is vertically arranged in the middle of the front side of the positioning block A, and the outer end surface of the positioning strip is a plane;

[0007] The fixture body includes a mounting base and a plurality of workpiece fixtures. The mounting base is a rectangular plate. A positioning groove is arranged on the lower side of the mounting base, which matches with two positioning ridges on the support platform. A plurality of mounting holes are evenly arranged on the surface of the mounting base. The lower sides of both ends of the mounting base are respectively provided with through T-shaped grooves. The plurality of workpiece fixtures are respectively arranged on the mounting holes on the front side of the mounting base by bolts. The positioning block B is arranged on the rear side of the mounting base by bolts, and the middle of the positioning block B corresponds to the position of the positioning strip of the positioning block A.

[0008] The positioning cylinder is arranged on the middle part of the front side of the support plate, and the protruding end of the positioning cylinder corresponds to the position of the positioning substrate on the support platform; the locking cylinder is arranged on the support plates on both sides of the support platform corresponding to the T-slot positions on the lower sides of both ends of the mounting substrate, and the telescopic rod end of the locking cylinder is provided with a locking block that matches the T-slot of the mounting substrate.

[0009] Specifically, the cross-section of the positioning ridge is inverted V-shaped or isosceles trapezoidal, and the depth of the positioning groove on the lower side of the mounting substrate is less than the height of the positioning ridge, so that a chip removal gap is formed between the lower side of the mounting substrate and the support table to ensure processing accuracy.

[0010] Specifically, the positioning block A is an inverted T-shaped structure, and a groove matching the positioning convex ridge is arranged on the bottom surface of the positioning block A. The two ends of the positioning block A are fixed to the support platform by bolts, and the bottom surface of the positioning block A is fitted with the surface of the support platform.

[0011] Specifically, the positioning bar and the positioning block A are an integrated structure, and the cross section of the positioning bar is square or trapezoidal; ensuring that the contact surface between the outer end surface of the positioning bar and the positioning block B is a vertical plane.

[0012] Specifically, a mounting hole is also provided on the upper surface of the mounting substrate, a workpiece fixture is provided on the mounting hole, and slots matching the shape of the workpiece to be processed are respectively provided on the workpiece fixture and the upper surface of the mounting substrate, so as to facilitate the clamping of the workpiece.

[0013] Due to the adoption of the above-mentioned technical solution, the utility model has the following advantages:

[0014] The positioning strip on the front side of the positioning block A of the utility model cooperates with the positioning block B to avoid large-area contact between the mounting substrate and the positioning block A, thereby avoiding chip accumulation in the contact surface. A chip removal gap is also provided between the positioning substrate and the support table to ensure multiple processing accuracy. The positioning ridges on the support table realize rapid positioning of the mounting substrate, which meets the needs of rapid interchange of the mounting substrate while ensuring the processing accuracy of each batch. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an overall schematic diagram of the utility model.

[0016] Figure 2 It is a schematic diagram of the utility model in another direction.

[0017] Figure 3 It is a schematic diagram of the support platform and the positioning block A of the utility model.

[0018] In the figure: 1-support plate, 2-support table, 21-positioning ridge, 3-positioning block A, 31-positioning bar, 4-clamp body, 41-mounting base plate, 42 workpiece clamp, 5-positioning block B, 6-positioning cylinder, 7-locking cylinder. DETAILED DESCRIPTION

[0019] The present invention is further explained below in conjunction with the accompanying drawings and embodiments, which should not be used to limit the protection scope of the present invention. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.

[0020] Combined with Figure 1-3 A quick positioning and clamping tool for CNC shown in the figure comprises a support plate 1, a support table 2, a positioning block A3, a fixture body 4, a positioning block B5, a positioning cylinder 6 and a locking cylinder 7.

[0021] The support plate 1 is set on the CNC workbench; the support table 2 is set at the center of the support plate 1, and positioning ridges 21 are symmetrically arranged near the two ends of the support table 2; the positioning blocks A3 are respectively arranged on the two positioning ridges 21 on the rear side of the support table 2, and a positioning strip 31 is vertically arranged in the middle of the front side surface of the positioning block A3, and the outer end surface of the positioning strip 31 is a plane.

[0022] The fixture body 4 includes a mounting base 41 and a plurality of workpiece fixtures 42. The mounting base 41 is a rectangular plate. The lower side of the mounting base 41 is provided with positioning grooves that respectively match the two positioning ridges 21 on the support platform 2. A plurality of mounting holes are evenly arranged on the plate surface of the mounting base 41. The lower sides of the two ends of the mounting base 41 are respectively provided with through T-shaped grooves. The plurality of workpiece fixtures 42 are respectively arranged on the mounting holes on the front side of the mounting base 41 by bolts; the positioning block B5 is arranged on the rear side of the mounting base 41 by bolts, and the middle part of the positioning block B5 corresponds to the position of the positioning strip 31 of the positioning block A3.

[0023] The positioning cylinder 6 is arranged on the middle part of the front side of the support plate 1, and the protruding end of the positioning cylinder 6 corresponds to the position of the positioning base plate on the support platform 2; the locking cylinder 7 is arranged on the support plate 1 on both sides of the support platform 2 corresponding to the T-slot positions on the lower sides of the two ends of the mounting base plate 41, and the telescopic rod end of the locking cylinder 7 is provided with a locking block that matches the T-slot of the mounting base plate 41.

[0024] Preferably, the cross-section of the positioning ridge 21 is inverted V-shaped or isosceles trapezoidal, and the depth of the positioning groove on the lower side of the mounting substrate 41 is less than the height of the positioning ridge 21, so that a chip removal gap is formed between the lower side of the mounting substrate 41 and the support platform 2 to ensure processing accuracy.

[0025] Preferably, the positioning block A3 is an inverted T-shaped structure, and a groove matching the positioning ridge 21 is provided on the bottom surface of the positioning block A3. Both ends of the positioning block A3 are fixed to the support platform 2 by bolts, and the bottom surface of the positioning block A3 is fitted with the surface of the support platform 2.

[0026] Preferably, the positioning bar 31 and the positioning block A3 are an integrated structure, and the cross section of the positioning bar 31 is square or trapezoidal; ensuring that the contact surface between the outer end surface of the positioning bar 31 and the positioning block B5 is a vertical plane.

[0027] Preferably, a mounting hole is also provided on the upper surface of the mounting substrate 41, a workpiece fixture 42 is provided on the mounting hole, and slots matching the shape of the workpiece to be processed are respectively provided on the upper surface of the workpiece fixture 42 and the mounting substrate 41, so as to facilitate the clamping of the workpiece.

[0028] When in use, the workpieces to be processed are installed on each workpiece fixture 42 on the fixture body 4. After filling, the fixture body 4 is placed on the front side of the support platform 2, the positioning groove on the lower surface of the mounting base 41 cooperates with the positioning ridge 21 on the support platform 2, the telescopic rods of the two locking cylinders 7 are in an extended state, and are respectively arranged in the T-slots at both ends of the mounting base 41, the positioning cylinder 6 is started, the telescopic rod of the positioning cylinder 6 is extended, and the fixture body 4 is pushed backward along the positioning ridge 21 until the positioning block B5 on the rear side of the fixture body 4 contacts the positioning strip 31 of the positioning block A3, the telescopic rods of the two locking cylinders 7 are retracted, and the locking blocks at the ends of the telescopic rods are pressed tightly in the T-slot of the mounting base 41, the fixture body 4 is fixed on the support platform 2, and the machine tool is started to process the workpieces; after all workpieces are processed, the telescopic rod of the positioning cylinder 6 is retracted, the telescopic rods of the two clamping cylinders are extended, the fixture body 4 is released, the fixture body 4 is removed, and the next fixture body 4 filled with workpieces is installed in the above manner.

[0029] The parts not described in detail in this utility model are prior art.

[0030] The embodiments selected in this article for the purpose of disclosing the invention of the utility model are currently considered to be suitable, but it should be understood that the utility model is intended to include all changes and improvements of the embodiments that belong to the scope of the present concept and utility model.

Claims

1. A CNC rapid positioning clamping tool, characterized in that: It includes a support plate, a support table, a positioning block A, a fixture body, a positioning block B, a positioning cylinder and a locking cylinder; The support plate is arranged on the CNC workbench; the support table is arranged at the center of the support plate, and positioning ridges are symmetrically arranged near the two ends of the support table; the positioning blocks A are respectively arranged on the two positioning ridges on the rear side of the support table, and a positioning strip is vertically arranged in the middle of the front side of the positioning block A; The fixture body includes a mounting base and a plurality of workpiece fixtures. The mounting base is a rectangular plate. A positioning groove is arranged on the lower side of the mounting base, which matches with two positioning ridges on the support platform. A plurality of mounting holes are evenly arranged on the surface of the mounting base. The lower sides of both ends of the mounting base are respectively provided with through T-shaped grooves. The plurality of workpiece fixtures are respectively arranged on the mounting holes on the front side of the mounting base by bolts. The positioning block B is arranged on the rear side of the mounting base by bolts, and the middle of the positioning block B corresponds to the position of the positioning strip of the positioning block A. The positioning cylinder is arranged on the middle part of the front side of the support plate, and the protruding end of the positioning cylinder corresponds to the position of the positioning substrate on the support platform; the locking cylinder is arranged on the support plates on both sides of the support platform corresponding to the T-slot positions on the lower sides of both ends of the mounting substrate, and the telescopic rod end of the locking cylinder is provided with a locking block that matches the T-slot of the mounting substrate.

2. The CNC rapid positioning and clamping tooling according to claim 1 is characterized in that: The cross section of the positioning ridge is inverted V-shape or isosceles trapezoidal, and the depth of the positioning groove on the lower side of the mounting substrate is smaller than the height of the positioning ridge, so that a chip removal gap is formed between the lower side of the mounting substrate and the support platform.

3. The CNC rapid positioning and clamping tool according to claim 1, characterized in that: The positioning block A is an inverted T-shaped structure, and a groove matching the positioning convex ridge is arranged on the bottom surface of the positioning block A. Both ends of the positioning block A are fixed to the support platform by bolts, and the bottom surface of the positioning block A is fitted with the surface of the support platform.

4. The CNC rapid positioning and clamping tool according to claim 1, characterized in that: The positioning bar and the positioning block A are an integrated structure, and the cross section of the positioning bar is square or trapezoidal.

5. The CNC rapid positioning and clamping tool according to claim 1, characterized in that: The upper surface of the mounting substrate is also provided with a mounting hole, a workpiece fixture is provided on the mounting hole, and slots matching the shape of the workpiece to be processed are respectively provided on the workpiece fixture and the upper surface of the mounting substrate.

Images