We already know that the workpiece must be positioned relative to the cutting tool and must be securely fixed in that position. After the workpiece has been scribed, it is still necessary to position the movement of the machine and fix the workpiece at that position before machining begins.
When several identical workpieces to be machined, using the jig and the jig can be substituted stroking operation is necessary for each piece, but if casting and forging, a specimen is required to be crossed, in order to ensure The workpiece can be machined through the test piece, and the position of the reinforcing ribs and cores is also ensured.
Drilling dies and jigs are identical in that they all contain means to ensure accurate positioning and tightening of the workpiece, with the difference that the dies contain the part that guides the tool in the actual cutting operation, and the jig does not. In fact, the only cutting tools that can be guided during cutting are drills , reamers and similar milling cutters , so the drill is used for drilling and the fixture is used in other machining processes. The fixture can include a cutting tool that is mounted relative to the positioning system.
1 advantages of drills and fixtures
1) Elimination of scribing and other methods of measurement and clamping.
2) Unskilled workers are aware that the workpiece can be accurately positioned. Moreover, the tool can be operated quickly and confidently under the premise that the tool can be accurately guided or installed.
3) Make assembly of parts easy. Because all parts are considered the same within a small range of limits, and part fitting and boring operations can be eliminated.
4) Make the parts interchangeable. If the product is sold in a wide range, the problem of spare parts can be simplified.
Bolt holes often leave a gap of 1.5 to 3.0 mm for the bolt, so the reader may be skeptical of the need to make a precise mold. But we must remember that once it is molded, it will be used for many parts, and the extra cost of making a precise mold will also be spread over a large number of products. In addition, the accumulation of errors during mechanical assembly is surprisingly small. When the gap is determined, we should ensure that it is customary, rather than roughly drawn and processed.
The positioning of the workpiece. It has 6 degrees of freedom under the condition that the space is completely free. We use three mutually perpendicular XX, YY, and ZZ axes to represent these six degrees of freedom. The unit body can be moved along any axis, so there are 3 translational degrees of freedom. The unit body can also be rotated about any one axis, so there are 3 degrees of freedom of rotation, for a total of 6 degrees of freedom. When positioning the workpiece, we should limit as much freedom as possible to ensure that the operation achieves the required accuracy. The accuracy is guaranteed by the positioning surface. The proper positioning surface should be determined as early as possible during the machining process. If other positioning surfaces must be used for other reasons, we should use these positioning surfaces for all positioning. If necessary, the new positioning surface should be machined from the old positioning surface.
Clamping. The clamping device should position the workpiece against the cutting force. The clamping force should not be too large to cause deformation and damage of the workpiece. The workpiece should be supported below the clamping point to ensure that the main frame of the drill or fixture is loaded and transferred to the machine table and bed. When designing the drill and clamp , the clamping device is designed to ensure proper clamping force and quick and safe operation.
2 definition of the drill
A drill is a device used to ensure that the workpiece is drilled, tapped or reamed in the correct position. It is basically made up of a clamping assembly. The workpiece holding means at a lower portion of the sleeve is hardened in air drilling process the drill bit is in the sleeve and along which the movement of the sleeve. If the construction of the workpiece is relatively simple, the mold can be clamped directly onto the workpiece. However, in most cases, the mold is held in place and the workpiece is clamped by the mold. In this way, the workpiece can be quickly introduced and exported before and after processing.
The drill makes the speed and accuracy of drilling, reaming and tapping much higher than traditional manual methods. Another advantage is that the use of a drill does not impose too high a skill on the processor. The positioning accuracy of the hole is not guaranteed by the operator but by the die.
Limit drills are generally used on devices used for drilling, winding, and tapping. It is generally not fully fixed on the machine in which it is used and can be moved on the platform on which the drill is placed so that the sleeve is directly below the drill bit . The limit drill actually limits and controls the path of the tool.
If the machining process includes some machining processes, such as milling, planing, forming, turning, etc., the limit fixture is used. The fixture grips the workpiece during machining, but unlike the drill, there is no device to specifically guide the tool.
3 typical drills and fixtures
Typical drill. For example, a drill for machining four holes in a workpiece flange that has been machined except for four holes. The workpiece has a precisely machined hole that has been positioned from the hole, end face and cylinder. It is not necessary to limit the circumferential position around the bore axis because it is symmetrical with respect to the axis until it is machined. The four bushings used to control the drill bit are attached to the drill plate, and the die plate can clamp the workpiece to the base of the device by means of a hand nut.
Typical milling fixture . For example, a simple fixture for milling a workpiece that has already completed other machining. The workpiece is positioned through two of the four holes in the base and the inner face of the base. The workpiece is clamped in place and the cutter is mounted on a mounting table that ensures installation or cut-in position and depth of cut. The fixture must be positioned relative to the machine's table by inserting the two borings at the bottom of the fixture into the slot on the machine table. The clamp is fastened to the table by T-bolts and also embedded in the groove of the table.
When several identical workpieces to be machined, using the jig and the jig can be substituted stroking operation is necessary for each piece, but if casting and forging, a specimen is required to be crossed, in order to ensure The workpiece can be machined through the test piece, and the position of the reinforcing ribs and cores is also ensured.
Drilling dies and jigs are identical in that they all contain means to ensure accurate positioning and tightening of the workpiece, with the difference that the dies contain the part that guides the tool in the actual cutting operation, and the jig does not. In fact, the only cutting tools that can be guided during cutting are drills , reamers and similar milling cutters , so the drill is used for drilling and the fixture is used in other machining processes. The fixture can include a cutting tool that is mounted relative to the positioning system.
1 advantages of drills and fixtures
1) Elimination of scribing and other methods of measurement and clamping.
2) Unskilled workers are aware that the workpiece can be accurately positioned. Moreover, the tool can be operated quickly and confidently under the premise that the tool can be accurately guided or installed.
3) Make assembly of parts easy. Because all parts are considered the same within a small range of limits, and part fitting and boring operations can be eliminated.
4) Make the parts interchangeable. If the product is sold in a wide range, the problem of spare parts can be simplified.
Bolt holes often leave a gap of 1.5 to 3.0 mm for the bolt, so the reader may be skeptical of the need to make a precise mold. But we must remember that once it is molded, it will be used for many parts, and the extra cost of making a precise mold will also be spread over a large number of products. In addition, the accumulation of errors during mechanical assembly is surprisingly small. When the gap is determined, we should ensure that it is customary, rather than roughly drawn and processed.
The positioning of the workpiece. It has 6 degrees of freedom under the condition that the space is completely free. We use three mutually perpendicular XX, YY, and ZZ axes to represent these six degrees of freedom. The unit body can be moved along any axis, so there are 3 translational degrees of freedom. The unit body can also be rotated about any one axis, so there are 3 degrees of freedom of rotation, for a total of 6 degrees of freedom. When positioning the workpiece, we should limit as much freedom as possible to ensure that the operation achieves the required accuracy. The accuracy is guaranteed by the positioning surface. The proper positioning surface should be determined as early as possible during the machining process. If other positioning surfaces must be used for other reasons, we should use these positioning surfaces for all positioning. If necessary, the new positioning surface should be machined from the old positioning surface.
Clamping. The clamping device should position the workpiece against the cutting force. The clamping force should not be too large to cause deformation and damage of the workpiece. The workpiece should be supported below the clamping point to ensure that the main frame of the drill or fixture is loaded and transferred to the machine table and bed. When designing the drill and clamp , the clamping device is designed to ensure proper clamping force and quick and safe operation.
2 definition of the drill
A drill is a device used to ensure that the workpiece is drilled, tapped or reamed in the correct position. It is basically made up of a clamping assembly. The workpiece holding means at a lower portion of the sleeve is hardened in air drilling process the drill bit is in the sleeve and along which the movement of the sleeve. If the construction of the workpiece is relatively simple, the mold can be clamped directly onto the workpiece. However, in most cases, the mold is held in place and the workpiece is clamped by the mold. In this way, the workpiece can be quickly introduced and exported before and after processing.
The drill makes the speed and accuracy of drilling, reaming and tapping much higher than traditional manual methods. Another advantage is that the use of a drill does not impose too high a skill on the processor. The positioning accuracy of the hole is not guaranteed by the operator but by the die.
Limit drills are generally used on devices used for drilling, winding, and tapping. It is generally not fully fixed on the machine in which it is used and can be moved on the platform on which the drill is placed so that the sleeve is directly below the drill bit . The limit drill actually limits and controls the path of the tool.
If the machining process includes some machining processes, such as milling, planing, forming, turning, etc., the limit fixture is used. The fixture grips the workpiece during machining, but unlike the drill, there is no device to specifically guide the tool.
3 typical drills and fixtures
Typical drill. For example, a drill for machining four holes in a workpiece flange that has been machined except for four holes. The workpiece has a precisely machined hole that has been positioned from the hole, end face and cylinder. It is not necessary to limit the circumferential position around the bore axis because it is symmetrical with respect to the axis until it is machined. The four bushings used to control the drill bit are attached to the drill plate, and the die plate can clamp the workpiece to the base of the device by means of a hand nut.
Typical milling fixture . For example, a simple fixture for milling a workpiece that has already completed other machining. The workpiece is positioned through two of the four holes in the base and the inner face of the base. The workpiece is clamped in place and the cutter is mounted on a mounting table that ensures installation or cut-in position and depth of cut. The fixture must be positioned relative to the machine's table by inserting the two borings at the bottom of the fixture into the slot on the machine table. The clamp is fastened to the table by T-bolts and also embedded in the groove of the table.
SBS prefabricated building is a new type environmental friendly product that adopts steel structure as frames, various plates and panels as surrounding protection system, high strength bolts as component connection. The metal frame buildings are mainly used as modular house, office, cleaning workshop, cold storage room, wide span workshop, warehouse, exhibition hall,stadiums , hangars, steel-structure supermarkets, high-rise steel constructions, logistics center, container house and so on.
Steel Truss Frame,Galvanized Truss Steel Space Frame,Frame Truss Steel,Prefab Metal Light Steel Structure Frame
Foshan Shengbang Steel Structure Co.,Ltd , https://www.sbsstructure.com