US3776021A

US3776021A - High-speed hammer

Info

Publication number: US3776021A
Application number: US00277039A
Authority: US
Inventors: N Lysov; V Stelamakh; M Fedotov; V Kollerov; V Guly; V Kononenko; S Kushnarenko
Original assignee: Individual
Current assignee: Individual
Priority date: 1972-08-01
Filing date: 1972-08-01
Publication date: 1973-12-04
Anticipated expiration: 1990-12-04

Abstract

A high-speed hammer wherein the working tools secured, respectively, on the anvil block and crosshead of a frame perform a working stroke being acted upon by a power unit mounted on the frame, and are returned to the initial position by compressed gas contained in a space in the anvil block. Said space accommodates a piston whose rod is adjustably connected with a bed for adjusting the position of the frame relative to said bed.

Description

United States Patent n91 Kononenko et a1.

[ HIGH-SPEED HAMMER [76] Inventors: Vadim Grigorievich Kononenko,

ulitsa Chkalova, l5, kv. 12; Sergei Grigorievich Kushnarenko, ulitsa Chkalova, 13, kv. 7; Vyacheslav Viktorovich Kollerov, prospekt Gagarina, 38, kv. 60; Vyacheslav Dmitrievich Guly, ulitsa Sapemaya, 12a, kv. 2; Viktor Alexlevish Stelamakh, ulitsa Kirova, 18, kv. 2, all of Kharkov; Mikhail Nikitovich Fedotov, ulitsa Chaikovskogyo, 10, kv. l; Nikolai Nikiforovieh Lysov, ulitsa Pushkina, 50, both of S tupino Moskovskoi oblasti, all of USSR.

[22] Filed: Aug. 1, 1972 21 App]. No.: 277,039

[52] US. Cl. 72/453, 72/407 [51] Int. Cl B2lj 9/18 [58] Field'of Search 72/407, 453; I 100/264, 269

v [4 1 Dec. 4, 1973 [56] References Cited UNITED STATES PATENTS 3,623,352 11/1971 Kramer 72/453 3,507,143 4/1970 Georg 72/453 3,422,658 1/1969 Michelson 72/407 3,135,140 6/1964 Ottestad et al. 72/453 2,914,971 12/1959 Kendall et al 72/407 2,863,343 12/1958 Stenfort 72/407 Primary ExaminerCharles W. Lanham Assistant Examiner-James R. Duzan Attorney-Eric H. Waters et al.-

57 ABSTRACT A high-speed hammer wherein the working tools secured, respectively, on the anvil block and crosshead of a frame perform a working stroke being acted upon by a power unit mounted on the frame, and are returned to the initial position by compressed gas contained in a space in the anvil block.

Said space accommodates a piston whose rod is adjustably connected with a bed for adjusting the position of the frame relative to said bed.

1 Claim, 2 Drawing Figures PATENTED DEC 4 I975 SHEET 2 BF 2 HIGH-SPEED HAMMER The present invention relates to working of metals by pressure and more specifically it relates to high-speed hammers.

Known in the art are high-speed hammers comprising a bed with a movably-installed frame carrying a power tions by said power unit, said working tools secured, respectively, on the crosshead and anvil block of the frame.

This hammber comprises a device forretuming the frame to the initial position and holding it there.

This device consists of power cylinders for lifting the frame to the initial position and a collet chuck for holding it in theupperposition, said chuck being located in the anvil block and controlled by a knockout in the course of its movement (see, for example, Author's Certificate No. 196,522,.Cl. 49.1).

In this hammer the position of the frame relative to the bed and, consequently, the position of its working zone is not adjusted for height which is sometimes necessary when the hammer is used as a component of a stamping line.

An object of the present invention is hammer wherein the position of its working zone could be changed to enable said hammer to be used as a component mechanism of a stamping line.

In accordance with this object we hereby provide a high-speed hammer comprising a frame movably installed on a bed, said frame carrying a power unit, and working tools actuated by said power unit for making a working stroke, said tools being secured, respectively, on the crosshead and anvil block of the frame, and a device for returning the frame to the initial position and holding it there wherein, according to the invention,

to provide a.

. unit, and working tools moved in the opposite direcsaid device is made in the form of a space located in the anvil block, filled with high-pressure gas and accommodating a piston whoserod is adjustably connected by a screw joint with the bed for adjusting the position of the frame for height with relation to the bed.

The high-speed hammer according to the present invention can be used in a stamping line because its design allows its working zone to be adjusted for height.

Now the invention will be described in detail by way of example with reference to the accompanying drawings in which: i 7

FIG. 1 is a general viewof the high-speed hammer according to the invention, partly cut away;

FIG. 2 is a section taken along line II-II in FIG. 1.

The high-speed hammer comprises a bed 1 (FIGS. 1,.

2) with guides 2 rigidly secured on it. Said guides are fastened to the bed 1 with the aid of wedges 3 which allow adjusting the position of said guides 2.

A frame 6 is secured on the bed 1 by means of a rod 4 (FIG. 1) provided with a piston 5 at the end. The.

frame 6 is formed by cylindrical stepped uprights 7 which carry an anvil block 8 on the top and a guide cylinder 9 at the bottom, said cylinder accommodating a crosshead 10 which is capable of vertical motion. Installed on the frame 6 under the .guide cylinder 9 is a power unit l'l.'

The ends of the uprights 7 are threaded to receive the nuts 12 which hold together all the above-mentioned elements of the frame.

The anvil block 8 and the crosshead 10 carry, respectively, the

working tools

13 and 14 which are constituted in this example by dies. The anvil block 8 consists of an upper plate 15, lower plate 16 and intermediate plates 17. The die 14 is fastened to the lower plate 16 while the upper plate 15 has a space 18 filled with highpressure gas and accommodating the piston'S with the rod 4. The upper threaded end of the rod 4 passes through a hole in the upper plate 19 of the bed 1, being secured to it by a nut 20 and a lock nut2l. This method of rod fastening allows the position of the frame to be changed with relation to the bed 1 when the hammer is used in a production line.

The rod 4has a channel 22 through which highpressure gas is delivered from a receiver (not shown in the drawing) into the space 18 for holding the frame in the topmostposition.

The plates 17 and 16 have holes forming a through channel 23 used for the passage of a knockout 24 which has a piston 25 at the end, located in the space The power unit 11 has a combustion chamber32 for buming. the gas-air mixture, a valve 33 and a channel 34 extending from the power unit 11 to the crosshead 10 the latter moving vertically in the guide cylinder 9.

The high-speed hammer operates as follows. The drawing illustrates the hammer in the initial position. The space 18 is filled with air through the channel 22 in the rod 4under a pressure required for holding a preset value, the valve 33 operates. The channel 34 the combustion chamber is put in communication with 32.

The pressure of the expanding gases is applied tothe lower face of the crosshead 10 and to the bottom of the combustion chamber 32 of the power unit 11.

The crosshead 10 together with the working tool 14 moves at ahigh speed upward in the guide cylinder9 and in the guides 2.

The pressure acting on the bottom of the combustion chamber 32 pushes down the power unit 1 1 and, consequently, the anvil block 8 together with the working tool 13.

The pressure of the expanding gases is converted into the kinetic energy of the

working tools

13 and 14 which working tool 14 secured to the crosshead loretums together with the crosshead 10 id the initial position under its own weight.

The stamped work is discharged by the knockout 24 for which purpose the hydraulic liquidflows from the connected to each other; working tools secured, respectively, on said anvil block and crosshead; a power unit mounted on said frame and intended to move said working tools towards each other during the working stroke; a space in said anvil block filled with highpressure gas for returning the frame to the initial position after the working stroke; a piston located in said space; the rod of said piston connected adjustably with said bed with the purpose of adjusting the position of said frame for height with relation to said bed.

Claims

1. A high-speed hammer comprising: a bed; a frame mounted on said bed with a provision for vertical motion and consisting of an anvil block and a crosshead connected to each other; working tools secured, respectively, on said anvil block and crosshead; a power unit mounted on said frame and intended to move said working tools towards each other during the working stroke; a space in said anvil block filled with high-pressure gas for returning the frame to the initial position after the working stroke; a piston located in said space; the rod of said piston connected adjustably with said bed with the purpose of adjusting the position of said frame for height with relation to said bed.