Seamless steel pipe cold-drawing die

Abstract

The utility model discloses a seamless steel tube cold-drawing die, including main body block, die body, side stopper, compression cylinder, locating block and locating groove, the main body block is composed of upper pressing block and base, and upper pressing block fixed mounting is in the base, and the base upper end surface is fixed with a plurality of locating grooves, and the upper pressing block lower end surface is fixed with a plurality of locating blocks corresponding with locating groove one to one, and locating block is inserted into locating groove completely, the base upper end surface and upper pressing block lower end surface all are equipped with the first recess and the second recess of being connected, and two first recesses constitute a first through -hole in common, and the first through -hole is the round hole of horizontal arrangement, and two second recesses constitute a placing groove in common, and the placing groove is conical platform shape, the placing groove and first through -hole are located on same central axis, and the placing groove and first through -hole are respectively in the both ends opening of main body block, the utility model discloses through locating block and locating groove cooperation, make upper pressing block and base accurate positioning installation, and it is difficult to appear the misplacement phenomenon.

Description

Technical Field

[0001] This utility model relates to the technical field of seamless steel pipes, and in particular to the technical field of cold drawing dies. Background Technology

[0002] Seamless steel pipes are made by piercing a whole round steel bar and have no weld seams on the surface. According to the production method, seamless steel pipes can be divided into hot-rolled seamless steel pipes, cold-rolled seamless steel pipes, cold-drawn seamless steel pipes, extruded seamless steel pipes, jacking pipes, etc., while cold drawing requires the use of cold drawing dies.

[0003] Existing patent CN221790582U discloses a cold drawing die for seamless steel pipes, including an upper fixing block. An upper die is fixedly connected to the middle of the bottom end of the upper fixing block, and a lower fixing block is arranged below the upper fixing block. A lower die is fixedly connected to the middle of the top end of the lower fixing block. The upper die and the lower die are in contact, while the upper fixing block and the lower fixing block are not in contact. A limiting groove 1 is formed at the upper end of the right side of the upper fixing block, a limiting groove 2 is formed at the lower end of the right side of the upper fixing block, and a limiting groove 3 is formed at the upper end of the right side of the lower fixing block. Limiting rods are arranged inside the limiting grooves 2 and 3. The limiting grooves 1 and 2 are also adapted to the limiting rods. The limiting grooves 1, 2, 3 and the limiting rods are symmetrically arranged with the front of the upper fixing block as the center. Its structure is complex and inconvenient to assemble. At the same time, the upper die and the lower die are prone to misalignment. Summary of the Invention

[0004] The purpose of this utility model is to solve the problems in the existing technology and propose a seamless steel pipe cold drawing mold, which enables the upper pressure block and the base to be accurately positioned and installed, making it less prone to misalignment. In addition, the mold body is firmly fixed and is not prone to loosening during use.

[0005] To achieve the above objectives, this utility model proposes a cold-drawing die for seamless steel pipes, comprising a main body block, a die body, side blocks, a clamping cylinder, positioning blocks, and positioning grooves. The main body block consists of an upper pressing block and a base. The upper pressing block is fixedly mounted on the base. Several positioning grooves are fixed on the upper surface of the base, and several positioning blocks corresponding one-to-one with the positioning grooves are fixed on the lower surface of the upper pressing block. The positioning blocks are fully inserted into the positioning grooves. Both the upper surface of the base and the lower surface of the upper pressing block are provided with connected first and second grooves. The two first grooves together form a first through hole, which is a horizontally arranged circular hole. The two second grooves together form a placement groove, which is truncated cone-shaped. The placement groove and the first through hole are located on the same central axis. The placement groove and the first through hole open at both ends of the main body block. The inner diameter of the opening is larger than the inner diameter of the bottom of the placement groove, and the inner diameter of the first through hole is smaller than the inner diameter of the bottom of the placement groove. The first through hole is connected to the placement groove. The mold body is placed in the placement groove. The mold body is in the shape of a frustum of a cone adapted to the placement groove. A side stop block is fixed at one end of the base. The side stop block and the base are an integral structure. The side stop block is located on the side where the placement groove opening of the main block is located. The side stop block is in contact with one side of the upper pressure block. A first threaded hole is provided on the side stop block. The first threaded hole is connected to the placement groove. The first threaded hole and the placement groove are located on the same central axis. The inner diameter of the first threaded hole is smaller than the major diameter of the placement groove. The outer wall of the pressing cylinder is provided with an external thread that matches the first threaded hole. The pressing cylinder is screwed on the first threaded hole. The pressing cylinder presses the mold body tightly. The inner hole of the pressing cylinder surrounds the mold hole of the mold body.

[0006] Preferably, the upper pressure block is provided with several second through holes that vertically penetrate the upper and lower ends of the upper pressure block, and the base is provided with several second threaded holes that correspond one-to-one with the second through holes. Each second through hole is equipped with a first bolt, which passes through the second through hole and is screwed onto the second threaded hole. The head of the first bolt presses tightly against the upper end face of the upper pressure block.

[0007] Preferably, the mold body is truncated cone-shaped, the taper of the mold body is the same as the taper of the placement groove, the maximum limit dimension of the major diameter of the mold body is less than or equal to the minimum limit dimension of the major diameter of the placement groove, and the minimum limit dimension of the minor diameter of the mold body is greater than or equal to the maximum limit dimension of the minor diameter of the placement groove.

[0008] Preferably, the inner hole of the clamping cylinder is a hexagonal hole.

[0009] Preferably, the side block is provided with several third through holes that horizontally penetrate both sides of the side baffle, and the upper pressure block is provided with third threaded holes that correspond one-to-one with the third through holes. Each third through hole is equipped with a second bolt, which passes through the third through hole and is screwed into the third threaded hole. The head of the second bolt presses tightly against the side of the side block away from the upper pressure block.

[0010] Preferably, the base is provided with a plurality of connecting parts, and the connecting parts are provided with a plurality of mounting holes.

[0011] The beneficial effects of this utility model are as follows: By cooperating with the positioning block and the positioning groove, the upper pressure block and the base can be accurately positioned and installed, and misalignment is not easy to occur; the truncated cone-shaped placement groove and the mold body are used together with the clamping cylinder to make the mold body firmly fixed and not easy to loosen during use.

[0012] The features and advantages of this utility model will be described in detail through embodiments and accompanying drawings. Attached Figure Description

[0013] Figure 1 This is a front sectional view of the seamless steel pipe cold drawing die of this utility model; Figure 2 This is a side sectional view of the seamless steel pipe cold drawing die of this utility model.

[0014] In the figure: 1-base, 2-upper pressure block, 3-side stop block, 4-mold body, 10-positioning groove, 11-first groove, 12-second groove, 15-connecting part, 20-positioning block, 25-first bolt, 30-first threaded hole, 31-pressure cylinder, 35-second bolt. Detailed Implementation

[0015] Example 1: See Figure 1 , Figure 2 The present invention relates to a seamless steel pipe cold drawing die, comprising a main body block, a die body 4, a side block 3, a clamping cylinder 31, a positioning block 20, and a positioning groove 10. The main body block is composed of an upper pressing block 2 and a base 1. The upper pressing block 2 is fixedly installed on the base 1. The upper pressing block 2 is provided with several second through holes that vertically penetrate the upper and lower ends of the upper pressing block 2. The base 1 is provided with several second threaded holes that correspond one-to-one with the second through holes. Each second through hole is equipped with a first bolt 25. The first bolt 25 passes through the second through hole and is screwed into the second threaded hole. The head of the first bolt 25 presses tightly against the upper end face of the upper pressing block 2.

[0016] The upper surface of the base 1 is fixed with several positioning grooves 10, and the lower surface of the upper pressure block 2 is fixed with several positioning blocks 20 that correspond one-to-one with the positioning grooves 10. The positioning blocks 20 are fully inserted into the positioning grooves 10.

[0017] The upper end face of the base 1 and the lower end face of the upper pressure block 2 are both provided with a connected first groove 11 and a second groove 12. The two first grooves 11 together form a first through hole, which is a horizontally arranged circular hole. The two second grooves 12 together form a placement groove, which is shaped like a frustum of a cone. The placement groove and the first through hole are located on the same central axis. The placement groove and the first through hole are respectively open at both ends of the main block. The inner diameter of the groove opening is larger than the inner diameter of the groove bottom, and the inner diameter of the first through hole is smaller than the inner diameter of the groove bottom. The first through hole is connected to the placement groove. The mold body 4 is placed in the placement groove. The mold body 4 is shaped like a frustum of a cone adapted to the placement groove.

[0018] The mold body 4 is shaped like a frustum cone. The taper of the mold body 4 is the same as the taper of the placement groove. The maximum limit dimension of the major diameter of the mold body 4 is less than or equal to the minimum limit dimension of the major diameter of the placement groove, and the minimum limit dimension of the minor diameter of the mold body 4 is greater than or equal to the maximum limit dimension of the minor diameter of the placement groove.

[0019] One end of the base 1 is fixed with a side stop block 3. The side stop block 3 and the base 1 are an integral structure. The side stop block 3 is located on the side where the placement groove of the main block is located. The side stop block 3 is in contact with one side of the upper pressure block 2. The side stop block 3 is provided with a first threaded hole 30. The first threaded hole 30 is connected to the placement groove. The first threaded hole 30 and the placement groove are located on the same central axis. The inner diameter of the first threaded hole 30 is smaller than the major diameter of the placement groove. The outer wall of the pressing cylinder 31 is provided with an external thread that matches the first threaded hole 30. The pressing cylinder 31 is screwed on the first threaded hole 30. The pressing cylinder 31 presses the mold body 4 tightly. The inner hole of the pressing cylinder 31 surrounds the mold hole of the mold body 4.

[0020] To make the clamping cylinder 31 easy to screw, the inner hole of the clamping cylinder 31 is a hexagonal hole.

[0021] Example 2: To prevent the side block 3 from deforming when the clamping cylinder 31 is tightened, the side block 3 is provided with several third through holes that horizontally penetrate both sides of the side baffle. The upper pressure block 2 is provided with third threaded holes that correspond one-to-one with the third through holes. Each third through hole is equipped with a second bolt 35. The second bolt 35 passes through the third through hole and is tightened into the third threaded hole. The head of the second bolt 35 presses tightly against the side of the side block 3 away from the upper pressure block 2.

[0022] Example 3: In order to make it easy to fix the base 1 on the cold drawing machine, the base 1 is provided with a number of connecting parts 15, and the connecting parts 15 are provided with a number of mounting holes. The base 1 can be easily installed on the cold drawing machine by bolts that cooperate with the mounting holes.

[0023] The working process of this utility model: In the operation of this utility model seamless steel pipe cold drawing die, the base 1 is installed on the cold drawing machine, the die body 4 is placed on the second groove 12 of the base 1, and then the upper pressure block 2 is installed on the base 1. During installation, the positioning block 20 is inserted into the positioning groove 10, and then the second bolt 35 is installed. Then, the clamping cylinder 31 is tightened with tools such as an Allen wrench so that the clamping cylinder 31 presses the die body 4. After the clamping cylinder 31 is tightened, the die installation is completed.

[0024] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. A cold drawing die for seamless steel pipes, characterized in that: The system includes a main block, a mold body (4), a side block (3), a clamping cylinder (31), a positioning block (20), and a positioning groove (10). The main block consists of an upper pressure block (2) and a base (1). The upper pressure block (2) is fixedly installed on the base (1). Several positioning grooves (10) are fixed on the upper end face of the base (1). Several positioning blocks (20) corresponding to the positioning grooves (10) are fixed on the lower end face of the upper pressure block (2). The positioning blocks (20) are completely inserted into the positioning grooves (10). The upper end face of the base (1) and the lower end face of the upper pressure block (2) are provided with connected first grooves (11) and second grooves (12). The two first grooves (11) together form a first through hole, which is a horizontally set circular hole. The two second grooves (12) together form a placement groove, which is shaped like a frustum cone. The placement groove and the first through hole are located on the same central axis. The placement groove and the first through hole are respectively opened at both ends of the main block. The inner diameter of the groove opening of the placement groove is larger than the groove of the placement groove. The inner diameter of the bottom is smaller than the inner diameter of the bottom of the placement groove. The first through hole is connected to the placement groove. The mold body (4) is placed in the placement groove. The mold body (4) is in the shape of a frustum of a cone adapted to the placement groove. A side stop block (3) is fixed at one end of the base (1). The side stop block (3) and the base (1) are an integral structure. The side stop block (3) is located on the side of the placement groove opening of the main block. The side stop block (3) is attached to one side of the upper pressure block (2). A... A first threaded hole (30) is connected to the placement groove. The first threaded hole (30) and the placement groove are located on the same central axis. The inner diameter of the first threaded hole (30) is smaller than the major diameter of the placement groove. The outer wall of the clamping cylinder (31) is provided with an external thread that matches the first threaded hole (30). The clamping cylinder (31) is screwed on the first threaded hole (30). The clamping cylinder (31) presses the mold body (4) tightly. The inner hole of the clamping cylinder (31) surrounds the mold hole of the mold body (4).

2. The seamless steel pipe cold drawing die as described in claim 1, characterized in that: The upper pressure block (2) is provided with several second through holes that vertically penetrate the upper and lower ends of the upper pressure block (2). The base (1) is provided with several second threaded holes that correspond one-to-one with the second through holes. Each second through hole is equipped with a first bolt (25). The first bolt (25) passes through the second through hole and is screwed onto the second threaded hole. The head of the first bolt (25) presses tightly against the upper end face of the upper pressure block (2).

3. The seamless steel pipe cold drawing die as described in claim 1, characterized in that: The mold body (4) is shaped like a frustum cone. The taper of the mold body (4) is the same as the taper of the placement groove. The maximum limit dimension of the major diameter of the mold body (4) is less than or equal to the minimum limit dimension of the major diameter of the placement groove. The minimum limit dimension of the minor diameter of the mold body (4) is greater than or equal to the maximum limit dimension of the minor diameter of the placement groove.

4. The seamless steel pipe cold drawing die as described in claim 1, characterized in that: The inner hole of the clamping cylinder (31) is a hexagonal hole.

5. The seamless steel pipe cold drawing die as described in claim 1, characterized in that: The side block (3) is provided with several horizontal through holes on both sides of the side baffle. The upper pressure block (2) is provided with a third threaded hole corresponding to the third through hole. Each third through hole is equipped with a second bolt (35). The second bolt (35) passes through the third through hole and is screwed into the third threaded hole. The head of the second bolt (35) presses tightly against the side of the side block (3) away from the upper pressure block (2).

6. The seamless steel pipe cold drawing die as described in any one of claims 1-5, characterized in that: The base (1) is provided with several connecting parts (15), and the connecting parts (15) are provided with several mounting holes.

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