Clamp for cold drawing process of high-strength alloy bar
By designing clamps with T-block and rack structures, the problem of clamps instability during cold drawing of high-strength alloy rods is solved, and stable operation and low-cost and efficient production are achieved.
Patent Information
- Application Number
- CN202422491828.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-15
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-10-15
AI Technical Summary
During the cold drawing of high-strength alloy rods, the clamps are prone to become unstable, resulting in jaw wear, slippage and rack breakage. Especially large-sized rods are difficult to guide stably, resulting in low production efficiency and high cost.
A clamp consisting of a symmetrical left clamp body and right clamp body is designed, adopting a T-shaped block and rack structure, the guide clamp body is a wedge-shaped trapezoidal block, and the rack is made of high-hard material, and is fixedly connected by bolts to achieve stable clamping and pulling.
It realizes stable operation and low scrap rate during the cold drawing of high-strength alloy rods, reduces material costs and improves production efficiency.
Smart Images
Figure CN223264519U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of metal material processing, and in particular relates to a clamp used in a cold drawing process of high-strength alloy bars. Background Art
[0002] Cold drawing is a process in which the head of a high-strength alloy bar is rolled to a finer thickness, then passed through a die and held with clamps to draw the entire bar thinner to meet performance requirements and improve yield. High-strength alloys such as GH4145, GH4169, 80A, C276, and N06625 are typically cold-drawn to achieve performance and dimensional requirements.
[0003] Patent application number CN201110382352.4 discloses an aluminum-magnesium-silicon alloy cold-drawn tube quenching device and a quenching method using the device, including a transmission system, and also including a feed table, a horizontal heating furnace, a discharge table, a quenching system, and a discharge table connected in sequence. The transmission system includes a motor, a transmission mechanism, and a roller transmission chain. The roller transmission chain is arranged in sequence and passes through the feed table, the horizontal heating furnace, the discharge table, the quenching system, and the discharge table. Electric heating tubes are symmetrically placed above and below the rollers on the roller transmission chain in the horizontal heating furnace. The arrangement of the electric heating tubes is parallel to the rollers. The loading area, heating area, quenching area, and receiving area of the aluminum tube are on the same horizontal straight line. The aluminum tube is always in a moving state. The aluminum tube moves forward by the friction between the rollers on the rotating roller transmission chain. During the forward movement, the aluminum tube completes heating and quenching and finally reaches the receiving area. This avoids drilling holes on the aluminum tube head and achieves the purpose of continuous loading and continuous quenching, and makes the loading and receiving operations simple and convenient, and the quenching process consumes less energy.
[0004] The difficulties in cold drawing high-strength alloys lie in: 1. The enormous pulling force can lead to clamp instability, such as jaw wear and slippage, and rack breakage. 2. Large-sized bars can become unstable because the guide jaws can't reach the front end, preventing the rack from clamping properly. During production, jaw instability often occurs after only a few bars have been drawn, leading to scrap. This necessitates frequent replacement of the clamps and racks, resulting in high costs and low efficiency. Summary of the Invention
[0005] In order to overcome the shortcomings of the prior art, the present invention provides a clamp for high-temperature alloy processing that can operate stably and has a low scrap rate. The specific technical solution is as follows:
[0006] A clamp for the cold drawing process of high-strength alloy bars, which consists of a symmetrical left clamp body 1 and a right clamp body 2. The left clamp body 1 consists of a left clamp base, a left T-block 12 and a plurality of left racks 13. The left clamp base is scissor-type as a whole. A left T-slot 111 is provided on the inner side of the left clamp base 11. The left T-slot 111 matches the left T-block 12. The left T-slot 111 and the left T-block 12 are combined and fixed by bolts. The left T-slot 111 and the left T-block 12 are respectively provided with positioning bolt holes 112 and positioning bolt holes 113 for fixing the left T-block 12 to the left clamp base; the lower half of the left T-block 12 (referring to the end in contact with the alloy bar to be processed) is provided with a plurality of grooves 121 for correspondingly fixing a plurality of left racks 13. After being fixed, the plurality of left racks 13 protrude from the left T-block 12 with a protrusion height of 3-5 mm. Correspondingly, the right clamp body 2 is composed of a right clamp base, a right T-block and a plurality of right racks. The right clamp base is scissor-type as a whole. A right T-slot is provided on the inside of the right clamp base. The right T-slot matches the right T-block, and the right T-slot and the right T-block are respectively provided with positioning bolt holes and positioning through holes for fixing the right T-block on the right clamp base; the lower half of the right T-block (referring to the end in contact with the alloy bar to be processed) is provided with a plurality of grooves for correspondingly fixing a plurality of right racks. After being fixed, the plurality of right racks protrude from the right T-block, and the protrusion height is 3-5mm.
[0007] A guide clamp body 14 and a guide clamp body 24 are respectively provided on the top of the left clamp body 1 and the right clamp body 2. The guide clamp body 14 and the guide clamp body 24 are wedge-shaped trapezoidal blocks.
[0008] The left rack 13 is in the shape of a rectangular bar, and its dimensions are 5 mm in length, 5 mm in width, and 30-50 mm in height respectively; there are 2-5 left racks 13 .
[0009] The shape, size and number of the right rack are the same as those of the left rack.
[0010] The left rack 13 and the right rack are both made of materials with a hardness of HRC60 or above.
[0011] The application method of the aforementioned clamp includes the following steps: first, selecting a guide clamp body of corresponding specifications according to the diameter of the rod, and the selected guide clamp body has a thickness of 5-10 cm; embedding the rack into the T-block; embedding the T-block into the groove of the guide clamp body, and fixing the T-block to the guide clamp body by bolts; installing the guide clamp into the drawing mechanism; and performing drawing, tightening the clamp during drawing, and clamping the rack into the drawing head to form sufficient drawing strength.
[0012] The present invention provides a low-cost and high-efficiency production method for high-strength alloy drawing production:
[0013] 1. A flexibly replaceable T-block and rack are designed to save material costs;
[0014] 2. For the drawing of large-sized bars, the problem of easy slipping and instability is solved through the optimized design of the guide clamp body.
[0015] 3. The rack is made by a reasonable material selection and drawing process, which achieves low cost and high efficiency application. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 is a top view of the clamp in Example 1;
[0017] Figure 2 is a three-dimensional diagram of the right clamp body in Example 1;
[0018] Figure 3 Schematic diagram of the left T-block in Example 1;
[0019] Figure 4 is a top view of the clamp in Example 3;
[0020] Figure 5 This is a top view of the clamp in Example 4.
[0021] Among them: 1-left clamp body; 2-right clamp body; 12-left T-block; 22-right T-block; 13-left rack; 111-left T-slot; 112-positioning bolt hole; 113-positioning through hole; 14-left guide clamp body; 24-right guide clamp body. DETAILED DESCRIPTION Example
[0022] like Figure 1-3As shown, a clamp for the cold drawing process of high-strength alloy bars is composed of a symmetrical left clamp body 1 and a right clamp body 2. The left clamp body 1 is composed of a left clamp base, a left T-block 12 and a plurality of left racks 13. The left clamp base 11 is a scissor-type as a whole. A left T-slot 111 is provided on the inside of the left clamp base. The left T-slot 111 matches the left T-block 12, and the left T-slot 111 and the left T-block 12 are respectively provided with a positioning bolt hole 112 and a positioning through hole 113 for fixing the left T-block 12; the lower half of the left T-block 12 is provided with a plurality of grooves 121 for correspondingly fixing a plurality of left racks 13. After being fixed, the plurality of left racks 13 protrude from the left T-block 12 with a protruding height of 3-5 mm. Correspondingly, the right clamp body 2 is composed of a right clamp base, a right T-block and a plurality of right racks. The right clamp base is scissor-type as a whole. A right T-slot is provided on the inside of the right clamp base. The right T-slot matches the right T-block, and the right T-slot and the right T-block are respectively provided with positioning bolt holes and positioning bolt holes for fixing the right T-block on the right clamp base; the lower half of the right T-block (referring to the end in contact with the alloy bar to be processed) is provided with a plurality of grooves for correspondingly fixing a plurality of right racks. After being fixed, the plurality of right racks protrude from the right T-block, and the protrusion height is 3-5mm.
[0023] A left guide clamp body 14 and a right guide clamp body 24 are respectively provided on the top of the left clamp body 1 and the right clamp body 2. The left guide clamp body 14 and the right guide clamp body 24 are wedge-shaped trapezoidal blocks.
[0024] The left rack 13 is in the shape of a rectangular bar, and its dimensions are 5 mm in length, 5 mm in width, and 30-50 mm in height respectively; there are 2-5 left racks 13 .
[0025] The shape, size and number of the right rack are the same as those of the left rack.
[0026] The left rack and the right rack are made of materials with a hardness of HRC40 or above. Example
[0027] A method for applying a clamp for a high-strength alloy bar cold drawing process comprises the following steps: first, selecting a guide clamp body of corresponding specifications according to the bar diameter; then, embedding a rack into a T-block; then, embedding the T-block into a groove of the guide clamp body, and fixing the T-block to the guide clamp body by bolts; then, installing the guide clamp into a drawing mechanism; finally, carrying out drawing, wherein the clamp is tightened during drawing, and the rack is clamped into the drawing head to form sufficient drawing strength. Example
[0028] The cold drawing process of GH4145 bar with diameter less than 20mm is firstly carried out as follows: Figure 4As shown, the selected guide pliers body D1 is 75mm thick. The rack is inserted into the T-block; the T-block is inserted into the groove of the guide pliers body and bolted to the guide pliers body. The guide pliers are installed in the drawing mechanism. During the drawing process, the clamps are tightened, and the rack is locked into the drawing head to provide sufficient drawing strength. The rack can typically be used over 100 times and still remain in good condition. Example
[0029] The GH4145 bar with a diameter of 20-30 mm is cold drawn. First, Figure 5 As shown, the selected guide pliers body D2 is 65mm thick. The rack is inserted into the T-block; the T-block is inserted into the groove of the guide pliers body and bolted to the guide pliers body. The guide pliers are installed in the drawing mechanism. During the drawing process, the clamps are tightened, and the rack is locked into the drawing head to provide sufficient drawing strength. The rack can typically be used over 100 times and still remain in good condition. Example
[0030] Cold drawing GH4145 bars with a diameter of 30-40mm begins with a 55mm thick guide jaw. The rack is inserted into the T-block, which is then inserted into the groove in the jaws and bolted to the jaws. The jaws are then installed in the drawing mechanism. Drawing begins, with the jaws tightened and the rack locked into the drawing head to achieve sufficient strength. The rack typically lasts over 50 cycles without damage.
Claims
1. A clamp for high-strength alloy bar cold drawing process, characterized in that: The invention comprises a symmetrical left clamp body (1) and a right clamp body (2), wherein the left clamp body (1) is composed of a left clamp base, a left T-shaped block (12) and a plurality of left racks (13), the left clamp base being in a scissor-type configuration as a whole, a left T-shaped slot (111) being provided on the inner side of the left clamp base (11), the left T-shaped slot (111) being matched with the left T-shaped block (12), and the left T-shaped slot (111) and the left T-shaped block (12) being respectively provided with a positioning bolt hole (112) and a positioning through hole (113) for fixing the left T-shaped block (12) on the left clamp base; the lower half of the left T-shaped block (12) being provided with a plurality of grooves (121) for correspondingly fixing a plurality of left racks (13), and the plurality of left racks (13) being fixed protrude from the left T-shaped block (12), with a protrusion height of 3-5 mm.
2. The clamp for high-strength alloy bar cold drawing process according to claim 1, characterized in that: A left guide clamp body (14) and a right guide clamp body (24) are respectively provided on the top of the left clamp body (1) and the right clamp body (2), and the left guide clamp body (14) and the right guide clamp body (24) are wedge-shaped trapezoidal blocks.
3. The clamp for high-strength alloy bar cold drawing process according to claim 1 or 2, characterized in that: The left rack (13) is in the shape of a rectangular bar, and its dimensions are 5 mm in length, 5 mm in width, and 30-50 mm in height, respectively; there are 2-5 left racks (13).
4. The clamp for high-strength alloy bar cold drawing process according to claim 3, characterized in that: The left rack (13) is made of a material with a hardness of HRC60 or above.
Citation Information
Patent Citations
Quenching equipment for Al-Mg-Si system aluminum alloy cold drawn pipes, and quenching method thereof
CN102418056A