CN201625819U - lathe set threading tool - Google Patents

Abstract

The utility model solves the problem that the center of the die is difficult to be adjusted by the automatic threading tool of the lathe, and provides a tool which can align the center conveniently, accurately and quickly, and is used for the automatic threading of the lathe. The tool mainly includes a spindle sleeve, a sliding connector, and a die. The die is fixed on the sliding connector, and the spindle sleeve is placed outside the sliding connector. In the fixed cavity, at least one die cover is nested outside the die, and the die is fixed in the fixed cavity by fasteners. Since the die and the die holder are both cylindrical, the outer diameter of the die holder matches the inner diameter of the opening, and the outer diameter of the die matches the inner diameter of the die holder. The above-mentioned matching relationship is clearance fit, so that the center of the die can be guaranteed. The line coincides with the center line of the opening, so the die holder can position the die so that the die and the opening are concentric.

Description

lathe set threading tool

technical field

The utility model relates to a threading tool, in particular to a lathe threading tool.

Background technique

There are two methods for traditional threading operations: one is to use the die holder by hand. During the operation, the operator holds the die holder with one hand, and shakes the hand wheel of the lathe to feed the knife with the other hand. , labor intensity is big, and work efficiency is low; Another kind is the threading of tailstock of hand lathe, although this method can guarantee the quality of threading, it is safer. But the main shaft of this device is a whole, and the die frame is divided into three parts: the head, the tail and the sleeve body. The tail end is put into the tailstock hole of the lathe, and the head end is a clamping die. During operation, the operator shakes the handwheel of the tailstock to feed the tool, the lathe drives the knife to bite, and drags the entire tailstock to move along the bed surface with the main shaft sleeve. Due to the heavy load, not only the speed of the lathe is limited, but also the bed surface is greatly worn, which greatly reduces the service life of the lathe, and the strength is still high, and the work efficiency is also low.

The Chinese Patent Office announced CN2660780U on December 5, 1990. The name is a tapping and threading device with combined automatic tool feeding, which mainly includes a main shaft sleeve and a tap shaft. Two guide screw holes are arranged on the tap shaft, and the tap shaft is sleeved on the main shaft. Inside the sleeve, the main shaft sleeve is provided with a guide groove, and the tap shaft can move in the main shaft sleeve along the guide groove. The device can automatically move the tool, but every time the tap and die are replaced, the center needs to be centered. The centering method is aligned by manual experience based on the depth of the positioning bolt screwed in. Therefore, the center is not easy to align. It is easy to be eccentric when the wire is working.

Contents of the invention

The utility model solves the problem that the center of the die is difficult to be adjusted by the automatic threading tool of the lathe, and provides a tool which can align the center conveniently, accurately and quickly, and is used for the automatic threading of the lathe.

The technical solution adopted by the utility model to solve the technical problem is: a lathe sleeve thread tool, which mainly includes a main shaft sleeve, a sliding connection body, and a die, the die is fixed on the sliding connection body, and the main shaft sleeve is sleeved outside the sliding connection body, It is characterized in that: one end of the sliding connecting body is a die fixing part, the inside of the die is a die fixing cavity, at least one die cover is placed outside the die and the die is fixed in the fixing cavity by fasteners. Since the die and the die holder are both cylindrical, the outer diameter of the die holder matches the inner diameter of the opening, and the outer diameter of the die matches the inner diameter of the die holder. The above-mentioned matching relationship is clearance fit, so that the center of the die can be guaranteed. The line coincides with the center line of the opening, so the die holder can position the die so that the die and the opening are concentric.

Preferably, there are two die sets, which are divided into a large die set and a small die set, and the two die sets are mutually fitted. Large-plate braces can be multi-layered, but as the preferred method, there is only one layer of large-plate braces. The function of large-plate braces is to reduce the ring thickness of small-plate braces. The ring thickness of large-plate braces is determined, and small-plate braces The thickness of the ring of the brace is processed according to the thickness of the ring of the die to ensure that the outer diameter of the die is matched with the inner diameter of the opening, and the outer diameter of the die is matched with the inner diameter of the die. The matching relationship is clearance fit. It is a series, and the number of small dies is the same as that of dies, and the large dies can be used every time they are installed, so the materials used can be reduced.

As preferably, one side of the die set is provided with a base, the base of the large die set fits with the bottom surface of the fixed cavity, the base of the small die set fits with the base end surface of the large die set, and the die fits with the base end surface of the small die set . The thickness of the end face of the base of the die holder is processed according to the axial length of the die to ensure that after installation, the die is basically flush with the end face of the opening. Due to the large area of the base, the die holder and the die can be better fixed and can be reduced. Vibration when small die sets and dies work.

Preferably, one end of the main shaft sleeve is a sliding cavity, the other end is a taper handle, and the outer diameter of the mating end matches the inner diameter of the sliding cavity. The lathe tailstock chuck can clamp the taper shank and fix the spindle sleeve.

As a preference, several evenly distributed fastening screw holes are provided on the peripheral side wall of the die holder, and the fastening screws pass through the fastening screw holes to withstand the outer peripheral surface of the die. This prevents the die holder and the die from rotating, causing the die and workpiece to rotate together.

Preferably, a fastening hole is provided on the outer wall of the die circumference, and the fastening hole is matched with the head of the fastening screw. This can prevent the die and the fastening screw from sliding relative to each other. The head of the fastening screw can be made into a conical shape, and the fastening hole can be made into a conical hole. In this way, as long as the sharp angle of the fastening screw head is within the range of the conical hole during installation, it can be tightened. Firmware installation.

Preferably, the other end of the sliding connection body forms a mating end.

Preferably, one end of the main shaft sleeve is a sliding cavity, the outer diameter of the mating end matches the inner diameter of the sliding cavity, the matching relationship between the outer diameter of the mating end and the inner diameter of the sliding cavity is clearance fit, and the other end of the main shaft sleeve is a tapered shank.

As a preference, guide grooves are formed on the circumferential side wall of the sliding chamber along the axial direction, and there are two guide grooves, which are distributed symmetrically. Two limit pin holes are formed at the end of the mating end. Corresponding to the groove, the limit pin (passes through the guide groove and connects with the limit pin hole. The guide groove has two functions, one is that the sliding connection body can move axially along the guide groove, and the other is to prevent the sliding connection body from rotating. It is easy to disassemble. The head of the positioning pin has a thread at one end, and the corresponding positioning pin hole is a threaded hole. The positioning pin cap can be hexagonal or knurled on the surface. The purpose is to facilitate the disassembly and assembly of the positioning pin.

Preferably, the guide groove is located in the middle of the sliding chamber, or one end of the guide groove communicates with the end surface of the sliding chamber and is in the shape of an opening. The guide groove is located in the middle of the sliding cavity, which can increase the strength of the sliding cavity, and can ensure that after installation, the sliding connection body and the spindle sleeve are always connected together, and one end of the guide groove is connected to the end surface of the sliding cavity on the side of the sliding connection body. In other words, it is more convenient to disassemble the sliding connection body and replace the dies. Of course, the length of the guide groove should not be too short, otherwise the sliding connection body may slip.

The beneficial effects of the utility model are as follows: 1. The die set is a matching positioning part, and different die sets can be installed by selecting different die sets to make the central axis of the die coincide with the central axis of the main shaft sleeve, which solves the problem of having to replace the die each time. center adjustment, and it is difficult to adjust the problem; 2. Every time you change the die, you only need to choose the matching die set, no need to adjust the center, which greatly saves time and increases work efficiency; 3. This tool is easy to process, simple to obtain materials, and greatly reduces 4. The size of the die set described in this tool can form a series according to the size of the die, which is convenient for unified management.

Description of drawings

Fig. 1 is a kind of structural representation of the utility model.

Fig. 2 is an end face sectional view of the utility model.

1. Die, 2. Small die, 3. Large die, 4. Fastening screw, 5. Opening, 6. Tool body, 7. Guide groove, 8. Cooperating end, 9. Limit pin, 10. Spindle sleeve, 11. Slide cavity.

Detailed ways

The technical solutions of the present utility model will be further specifically described below through specific embodiments and in conjunction with the accompanying drawings.

Embodiment: a lathe threading tool (see accompanying drawings 1 and 2), one end of the main shaft sleeve 10 is a cylindrical sliding cavity 11, the other end is a tapered handle, and the tapered handle is Morse No. 4 (Morse NO.4 ) with a flat tail cone, the sliding cavity 11 and the taper shank are connected by welding, the central axes of the sliding cavity 11 and the taper shank 12 coincide during welding, the sliding connecting body 6 is integrally processed, the sliding connecting body 6 is hollow inside, and one end The outer diameter and the inner diameter of the sliding chamber 11 are clearance fit, and this end is called the mating end 8. There are two positioning pin holes at the end of the mating end 8, and the two positioning pin holes are symmetrically distributed. Two symmetrical guide grooves 7, the limit pin 9 passes through the guide groove 7 and connects with the limit pin hole, so the sliding connection body 6 can move relatively along the guide groove 7 and the main shaft sleeve 10, the other end of the sliding connection body 6 The outer diameter is about twice the outer diameter of the mating end 8, and the interior is a cylindrical cavity. This end is called the fixed part 5. The bottom surface of the fixed part 5 is parallel to the end face of the sliding cavity 11 and perpendicular to the central axis. The mating end The wall thickness of 8 is about twice the wall thickness of the fixed part 5, and the inside of the fixed part 5 is sequentially assembled with a die 1, a small die cover 2, a large die cover 3, a large die cover 3 and a small die cover 2 on the circumference side from the center to the outside. There are two symmetrical fastening screw holes on the wall. The outer wall of the die 1 is provided with a conical fastening hole. The head of the fastening screw 4 can be made into a conical shape. The fastening screw 4 passes through the fastening screw hole to withstand the Die 1 conical fastening hole.

When using, select the die 1 corresponding to the thread to be processed, and select the small die cover 2 corresponding to the die, and install and fasten it with the fastening screw 4 in the order of die 1, small die cover 2, and large die cover 3. The tailstock chuck of the lathe clamps the tapered shank 12, and the workpiece to be processed is installed on the head of the lathe. Start the lathe, and the lathe rotates forward at a low speed. Shake the hand wheel of the tailstock of the lathe to start threading, and stop when the die set is on the workpiece. Handwheel feed. The sliding connection body automatically moves forward along the guide groove on the main shaft sleeve. After the thread is set, it is reversed, and the tool body returns along the guide groove. At this time, the thread has been processed.

Claims (10)

1. A lathe sleeve threading tool, mainly comprising a main shaft sleeve (10), a sliding connection body (6), a die (1), the die (1) is fixed on the sliding connection body (6), and the main shaft sleeve (10) It is set outside the sliding connecting body (6), and it is characterized in that: one end of the sliding connecting body (6) is a die fixing part (5), the inside of the die (1) is a die fixing cavity, and at least one die cover is placed outside the die and used together The fastener secures the die in the fixing cavity. 2. The lathe threading tool according to claim 1, characterized in that: there are two die sets, which are divided into a large die set (3) and a small die set (2), and the two die sets are mutually fitted. 3. The threading tool for lathe sleeve according to claim 1 or 2, characterized in that: one side of the die set is provided with a base, the base of the large die set (3) fits with the bottom surface of the fixed cavity, and the small die set (2 ) is fitted to the base end face of the large die set (3), and the die (1) is fitted to the base end face of the small die set (2). 4. The lathe sleeve threading tool according to claim 3, characterized in that: the peripheral side wall of the die sleeve is provided with several evenly distributed fastening screw holes, and the fastening screws (4) pass through the fastening screw holes. The hole bears against the outer circumferential surface of the die (1). 5. The lathe threading tool according to claim 4, characterized in that: the peripheral outer wall of the die (1) is provided with a fastening hole, and the fastening hole matches the head of the fastening screw (4). 6. The lathe threading tool according to claim 1, characterized in that: the other end of the sliding connecting body (6) forms a mating end (8). 7. The lathe threading tool according to claim 1, characterized in that: one end of the main shaft sleeve (10) is a sliding cavity (11), and the outer diameter of the mating end (8) matches the inner diameter of the sliding cavity (11), The matching relationship between the outer diameter of the mating end (8) and the inner diameter of the sliding chamber (11) is clearance fit, and the other end of the main shaft sleeve (10) is a tapered shank. 8. The lathe threading tool according to claim 7, characterized in that: a guide groove (7) is formed on the circumferential side wall of the sliding chamber (11) along the axial direction, and there are two guide grooves (7), It is symmetrically distributed. There are two limit pin holes at the end of the mating end (8). The position of the limit pin holes corresponds to the guide groove (7). The limit pin (9) passes through the guide groove (7) and the limit Pin holes are connected. 9. The lathe threading tool according to claim 8, characterized in that: the guide groove (7) is located in the middle of the sliding chamber (11), or one end of the guide groove (7) and the end surface of the sliding chamber (11) Interlinked, in the shape of an opening. 10. The lathe socket threading tool according to claim 1, characterized in that: the side surface of the die socket is flush with the end surface of the fixing part (5).

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